E1 • The Bad Fish Paradigm

Penny's first date with Leonard goes awry and she finds Sheldon to be an unwilling confidant.

21m • 2008

Penny's first date with Leonard goes awry and she finds Sheldon to be an unwilling confidant.

E2 • The Codpiece Topology

A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.

20m • 2008

A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.

E3 • The Barbarian Sublimation

Sheldon creates a monster when he introduces Penny to online gaming.

20m • 2008

Sheldon creates a monster when he introduces Penny to online gaming.

E4 • The Griffin Equivalency

Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

20m • 2008

Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

E5 • The Euclid Alternative

Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.

19m • 2008

Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.

E6 • The Cooper-Nowitzki Theorem

Sheldon and the gang are confused when a young grad student is attracted to him.

20m • 2008

Sheldon and the gang are confused when a young grad student is attracted to him.

E7 • The Panty Piñata Polarization

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

20m • 2008

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

E8 • The Lizard-Spock Expansion

Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.

19m • 2008

Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.

E9 • The White Asparagus Triangulation

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

20m • 2008

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

E10 • The Vartabedian Conundrum

Leonard asks Penny for advice when his new relationship starts moving too fast.

20m • 2008

Leonard asks Penny for advice when his new relationship starts moving too fast.

E11 • The Bath Item Gift Hypothesis

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

20m • 2008

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

E12 • The Killer Robot Instability

Penny's criticism of Wolowitz's romantic life pushes him into depression and he goes AWOL for a fighting robot battle the rest of guys are depending on him for.

20m • 2008

Penny's criticism of Wolowitz's romantic life pushes him into depression and he goes AWOL for a fighting robot battle the rest of guys are depending on him for.

E13 • The Friendship Algorithm

Sheldon creates a scientific procedure for making friends.

20m • 2008

Sheldon creates a scientific procedure for making friends.

E14 • The Financial Permeability

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

21m • 2008

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

E15 • The Maternal Capacitance

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.

20m • 2008

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.

E16 • The Cushion Saturation

A paintball game leads to a fight between Sheldon and Penny and romance for Leslie and Wolowitz.

20m • 2008

A paintball game leads to a fight between Sheldon and Penny and romance for Leslie and Wolowitz.

E17 • The Terminator Decoupling

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.

20m • 2008

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.

E18 • The Work Song Nanocluster

Penny's home business turns into a complete nightmare when Sheldon takes over.

20m • 2008

Penny's home business turns into a complete nightmare when Sheldon takes over.

E19 • The Dead Hooker Juxtaposition

Penny squares off with a new beautiful female neighbor who may become the building's 'new Penny'.

19m • 2008

Penny squares off with a new beautiful female neighbor who may become the building's 'new Penny'.

E20 • The Hofstadter Isotope

A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

19m • 2008

A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

E21 • The Vegas Renormalization

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas. Sheldon becomes locked out of his apartment so must stay with Penny.

21m • 2008

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas. Sheldon becomes locked out of his apartment so must stay with Penny.

E22 • The Classified Materials Turbulence

Penny's second date with Stuart sees her making a comment that gives Leonard new hope for a relationship with her. Wolowitz realizes there's a crucial error in a NASA project he's working on.

18m • 2008

Penny's second date with Stuart sees her making a comment that gives Leonard new hope for a relationship with her. Wolowitz realizes there's a crucial error in a NASA project he's working on.

E23 • The Monopolar Expedition

The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.

20m • 2008

The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.

E1 • Pilot

Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins by showing them that as much as they know about science, they know little about actual living.

22m • 2007

Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins by showing them that as much as they know about science, they know little about actual living.

E2 • The Big Bran Hypothesis

Leonard volunteers to sign for a package in an attempt to make a good impression on Penny, but when he enlists Sheldon for help, his attempt at chivalry goes terribly awry.

20m • 2007

Leonard volunteers to sign for a package in an attempt to make a good impression on Penny, but when he enlists Sheldon for help, his attempt at chivalry goes terribly awry.

E3 • The Fuzzy Boots Corollary

Leonard asks a woman out after he finds out that Penny is seeing someone.

21m • 2007

Leonard asks a woman out after he finds out that Penny is seeing someone.

E4 • The Luminous Fish Effect

Getting fired forces Sheldon to explore what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk.

20m • 2007

Getting fired forces Sheldon to explore what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk.

E5 • The Hamburger Postulate

Sensing that he's wasting his time on Penny, Leonard ends up making a connection with Leslie.

19m • 2007

Sensing that he's wasting his time on Penny, Leonard ends up making a connection with Leslie.

E6 • The Middle-Earth Paradigm

Penny hosts a Hallowe'en party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.

20m • 2007

Penny hosts a Hallowe'en party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.

E7 • The Dumpling Paradox

With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team.

20m • 2007

With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team.

E8 • The Grasshopper Experiment

Raj's parents set him up on a blind date, but just when he discovers he can talk to her, she shows interest in Sheldon.

19m • 2007

Raj's parents set him up on a blind date, but just when he discovers he can talk to her, she shows interest in Sheldon.

E9 • The Cooper-Hofstadter Polarization

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard. Penny's intervention only exacerbates the situation.

19m • 2007

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard. Penny's intervention only exacerbates the situation.

E10 • The Loobenfeld Decay

Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.

20m • 2007

Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good.

E11 • The Pancake Batter Anomaly

With his friends knowing how sour he acts when he’s sick, Sheldon is nursed by Penny, who hasn't got a clue what she's in for.

21m • 2007

With his friends knowing how sour he acts when he’s sick, Sheldon is nursed by Penny, who hasn't got a clue what she's in for.

E12 • The Jerusalem Duality

With Sheldon rattled over meeting Dennis, a 15-year-old physicist who's smarter than he, Leonard helps him look for a way to debunk Dennis's research.

19m • 2007

With Sheldon rattled over meeting Dennis, a 15-year-old physicist who's smarter than he, Leonard helps him look for a way to debunk Dennis's research.

E13 • The Bat Jar Conjecture

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

21m • 2007

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

E14 • The Nerdvana Annihilation

When delivery of another collectible leads to Penny's lashing out at Leonard, he decides it's time to give up his habit, much to his friends' protestation.

19m • 2007

When delivery of another collectible leads to Penny's lashing out at Leonard, he decides it's time to give up his habit, much to his friends' protestation.

E15 • The Pork Chop Indeterminacy

The rest of the gang fall for Sheldon's twin sister and Leonard's plan to win her heart is derailed when Sheldon declares he'll be the one to decide who can date her.

21m • 2007

The rest of the gang fall for Sheldon's twin sister and Leonard's plan to win her heart is derailed when Sheldon declares he'll be the one to decide who can date her.

E16 • The Peanut Reaction

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

19m • 2007

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

E17 • The Tangerine Factor

Penny's break-up spurs Leonard to summon the courage to ask her out. Both go to Sheldon for advice on their upcoming date.

19m • 2007

Penny's break-up spurs Leonard to summon the courage to ask her out. Both go to Sheldon for advice on their upcoming date.

E1 • The Locomotion Interruption

Leonard and Amy take a road trip.

20m • 2014

Leonard and Amy take a road trip.

E2 • The Junior Professor Solution

Howard takes a class that Sheldon's teaching.

19m • 2014

Howard takes a class that Sheldon's teaching.

E3 • The First Pitch Insufficiency

Howard is invited by NASA to throw the first pitch at a game.

19m • 2014

Howard is invited by NASA to throw the first pitch at a game.

E4 • The Hook-Up Reverberation

Penny wonders why Raj's girlfriend doesn't like her.

18m • 2014

Penny wonders why Raj's girlfriend doesn't like her.

E5 • The Focus Attentuation

The guys unsuccessfully try to invent "the next big thing".

18m • 2014

The guys unsuccessfully try to invent "the next big thing".

E6 • The Expedition Approximation

Sheldon and Raj venture underground in the name of science.

21m • 2014

Sheldon and Raj venture underground in the name of science.

E7 • The Misinterpretation Agitation

Penny's flirtatious sales techniques work a little too well.

19m • 2014

Penny's flirtatious sales techniques work a little too well.

E8 • The Prom Equivalency

Love is in the air when the gang recreates a prom night.

19m • 2014

Love is in the air when the gang recreates a prom night.

E9 • The Septum Deviation

Leonard's minor surgery leads to Sheldon's major reaction.

19m • 2014

Leonard's minor surgery leads to Sheldon's major reaction.

E10 • The Champagne Reflection

Sheldon records the final instalment of "Fun with Flags".

19m • 2014

Sheldon records the final instalment of "Fun with Flags".

E11 • The Clean Room Infiltration

Amy forces Sheldon to celebrate a Victorian Christmas.

19m • 2014

Amy forces Sheldon to celebrate a Victorian Christmas.

E12 • The Space Probe Disintegration

The guys finally agree to do something the girls like.

19m • 2014

The guys finally agree to do something the girls like.

E13 • The Anxiety Optimization

Sheldon asks his friends to challenge him.

19m • 2014

Sheldon asks his friends to challenge him.

E14 • The Troll Manifestation

Leonard and Sheldon defend themselves from an online bully.

20m • 2014

Leonard and Sheldon defend themselves from an online bully.

E15 • The Comic Book Store Regeneration

Everyone awaits the reopening of Stuart's comic bookstore.

19m • 2014

Everyone awaits the reopening of Stuart's comic bookstore.

E16 • The Intimacy Acceleration

Sheldon and Penny try an experiment in falling in love.

19m • 2014

Sheldon and Penny try an experiment in falling in love.

E17 • The Colonization Application

Sheldon applies for a one-way mission to colonise Mars.

19m • 2014

Sheldon applies for a one-way mission to colonise Mars.

E18 • The Leftover Thermalization

A final family dinner is held for Mrs. Wolowitz.

19m • 2014

A final family dinner is held for Mrs. Wolowitz.

E19 • The Skywalker Incursion

Sheldon and Leonard try to sneak onto Skywalker Ranch.

20m • 2014

Sheldon and Leonard try to sneak onto Skywalker Ranch.

E20 • The Fortification Implementation

Wolowitz meets the half-brother he never knew he had.

19m • 2014

Wolowitz meets the half-brother he never knew he had.

E21 • The Communication Deterioration

Penny contemplates a return to acting.

18m • 2014

Penny contemplates a return to acting.

E22 • The Graduation Transmission

Raj's father cuts him off from the family fortune.

18m • 2014

Raj's father cuts him off from the family fortune.

E23 • The Maternal Combustion

Sparks fly when Leonard and Sheldon's mothers finally meet.

18m • 2014

Sparks fly when Leonard and Sheldon's mothers finally meet.

E24 • The Commitment Determination

Sheldon pushes Leonard and Penny to set a date.

19m • 2014

Sheldon pushes Leonard and Penny to set a date.

E1 • The Skank Reflex Analysis

Penny is worried with how damaged her friendship with the guys will be in the aftermath of her sleeping with Raj while Sheldon becomes the leader of the paintball team.

21m • 2011

Penny is worried with how damaged her friendship with the guys will be in the aftermath of her sleeping with Raj while Sheldon becomes the leader of the paintball team.

E2 • The Infestation Hypothesis

A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya.

19m • 2011

A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya.

E3 • The Pulled Groin Extrapolation

Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz.

19m • 2011

Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz.

E4 • The Wiggly Finger Catalyst

Penny plays Matchmaker for Raj, which results in him finding a girl he is comfortable talking to.

19m • 2011

Penny plays Matchmaker for Raj, which results in him finding a girl he is comfortable talking to.

E5 • The Russian Rocket Reaction

Sheldon and Leonard get invited to a party at Wil Wheaton's house, and Howard gets an out-of-this-world opportunity.

21m • 2011

Sheldon and Leonard get invited to a party at Wil Wheaton's house, and Howard gets an out-of-this-world opportunity.

E6 • The Rhinitis Revelation

Sheldon's mother, Mary Cooper, comes to visit, but Sheldon is annoyed that she spends time with the rest of the gang instead of catering to his every demand.

20m • 2011

Sheldon's mother, Mary Cooper, comes to visit, but Sheldon is annoyed that she spends time with the rest of the gang instead of catering to his every demand.

E7 • The Good Guy Fluctuation

A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.

19m • 2011

A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.

E8 • The Isolation Permutation

Amy becomes heartbroken when she discovers that Penny and Bernadette went wedding dress shopping without her.

20m • 2011

Amy becomes heartbroken when she discovers that Penny and Bernadette went wedding dress shopping without her.

E9 • The Ornithophobia Diffusion

Leonard and Penny try hanging out as friends on a 'non-date', but end up purposely ruining each others chances with perspective dates. Meanwhile, Sheldon enlists the help of Bernadette and Amy to overcome his fear of birds.

20m • 2011

Leonard and Penny try hanging out as friends on a 'non-date', but end up purposely ruining each others chances with perspective dates. Meanwhile, Sheldon enlists the help of Bernadette and Amy to overcome his fear of birds.

E10 • The Flaming Spittoon Acquisition

Sheldon becomes jealous when Stuart asks Amy for a date.

20m • 2011

Sheldon becomes jealous when Stuart asks Amy for a date.

E11 • The Speckerman Recurrence

Leonard must face his fears after being contacted by his high school tormentor.

19m • 2011

Leonard must face his fears after being contacted by his high school tormentor.

E12 • The Shiny Trinket Maneuver

Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplishment, and Howard must come to grips with Bernadette's dislike of children.

20m • 2011

Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplishment, and Howard must come to grips with Bernadette's dislike of children.

E13 • The Recombination Hypothesis

Leonard, having broken up with Priya, asks Penny out to a spur-of the-moment romantic dinner for two.

20m • 2011

Leonard, having broken up with Priya, asks Penny out to a spur-of the-moment romantic dinner for two.

E14 • The Beta Test Initiation

Leonard and Penny deal with the idea of starting a relationship again and Raj finally finds a 'woman' he can talk to without being drunk, in the form of Siri on his new phone.

20m • 2011

Leonard and Penny deal with the idea of starting a relationship again and Raj finally finds a 'woman' he can talk to without being drunk, in the form of Siri on his new phone.

E15 • The Friendship Contraction

Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.

20m • 2011

Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.

E16 • The Vacation Solution

When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab.

20m • 2011

When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab.

E17 • The Rothman Disintegration

Penny is horrified when Amy gives her a gift: a huge, quite horrible painting of the two of them. With no good way to avoid displaying it, she only hangs it up when Amy is over.

20m • 2011

Penny is horrified when Amy gives her a gift: a huge, quite horrible painting of the two of them. With no good way to avoid displaying it, she only hangs it up when Amy is over.

E18 • The Werewolf Transformation

Sheldon becomes agitated when his regular barber is out sick. Astronaut training causes Howard to reconsider wanting to go into space.

20m • 2011

Sheldon becomes agitated when his regular barber is out sick. Astronaut training causes Howard to reconsider wanting to go into space.

E19 • The Weekend Vortex

Sheldon must choose between joining Amy at her aunt's birthday party or playing videogames all weekend with the guys.

19m • 2011

Sheldon must choose between joining Amy at her aunt's birthday party or playing videogames all weekend with the guys.

E20 • The Transporter Malfunction

Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the 'Future Mrs. Koothrappali' after his parents set him up on a date.

20m • 2011

Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the 'Future Mrs. Koothrappali' after his parents set him up on a date.

E21 • The Hawking Excitation

When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero.

18m • 2011

When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero.

E22 • The Stag Convergence

After the guys throw Howard a bachelor party, Bernadette reconsiders marrying him after learning about his sexual history.

21m • 2011

After the guys throw Howard a bachelor party, Bernadette reconsiders marrying him after learning about his sexual history.

E23 • The Launch Acceleration

When NASA moves up Howard's mission, he must face his fears and Bernadette's dad, thus putting the wedding plans in jeopardy.

20m • 2011

When NASA moves up Howard's mission, he must face his fears and Bernadette's dad, thus putting the wedding plans in jeopardy.

E24 • The Countdown Reflection

The fifth season ends with Howard and Bernadette deciding to get married before his NASA mission, causing the gang to scurry into overdrive in an effort to stage the wedding.

20m • 2011

The fifth season ends with Howard and Bernadette deciding to get married before his NASA mission, causing the gang to scurry into overdrive in an effort to stage the wedding.

E1 • The Robotic Manipulation

Penny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm.

21m • 2010

Penny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm.

E2 • The Cruciferous Vegetable Amplification

Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

20m • 2010

Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

E3 • The Zazzy Substitution

The guys are concerned as Sheldon searches for an alternative to human companionship.

21m • 2010

The guys are concerned as Sheldon searches for an alternative to human companionship.

E4 • The Hot Troll Deviation

An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.

19m • 2010

An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.

E5 • The Desperation Emanation

Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.

20m • 2010

Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.

E6 • The Irish Pub Formulation

Leonard keeps an affair a secret from Sheldon, Howard and Raj.

21m • 2010

Leonard keeps an affair a secret from Sheldon, Howard and Raj.

E7 • The Apology Insufficiency

Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.

21m • 2010

Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.

E8 • The 21-Second Excitation

While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

18m • 2010

While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

E9 • The Boyfriend Complexity

Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.

20m • 2010

Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.

E10 • The Alien Parasite Hypothesis

Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.

19m • 2010

Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.

E11 • The Justice League Recombination

The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.

19m • 2010

The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.

E12 • The Bus Pants Utilization

Leonard's idea for a smartphone app derails his friendship with Sheldon.

21m • 2010

Leonard's idea for a smartphone app derails his friendship with Sheldon.

E13 • The Love Car Displacement

Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.

20m • 2010

Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.

E14 • The Thespian Catalyst

Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.

21m • 2010

Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.

E15 • The Benefactor Factor

A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.

19m • 2010

A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.

E16 • The Cohabitation Formulation

As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.

20m • 2010

As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.

E17 • The Toast Derivation

Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.

20m • 2010

Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.

E18 • The Prestidigitation Approximation

Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.

20m • 2010

Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.

E19 • The Zarnecki Incursion

Sheldon's World of Warcraft online game account is hacked and he is determined to find out who did it. Also Penny shares some girl talk with her friends about Leonard and his new girlfriend.

21m • 2010

Sheldon's World of Warcraft online game account is hacked and he is determined to find out who did it. Also Penny shares some girl talk with her friends about Leonard and his new girlfriend.

E20 • The Herb Garden Germination

Sheldon and Amy decide to start several rumors about the others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level.

20m • 2010

Sheldon and Amy decide to start several rumors about the others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level.

E21 • The Agreement Dissection

When Leonard spends too much time in the shower with Priya, Sheldon charges Leonard with two violations of the roommate agreement.

20m • 2010

When Leonard spends too much time in the shower with Priya, Sheldon charges Leonard with two violations of the roommate agreement.

E22 • The Wildebeest Implementation

Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.

20m • 2010

Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.

E23 • The Engagement Reaction

When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.

19m • 2010

When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.

E24 • The Roommate Transmogrification

When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she regrets.

21m • 2010

When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she regrets.

E1 • The Electric Can Opener Fluctuation

When Sheldon learns that the guys tampered with his expedition data he got from the arctic, he leaves to Texas in disgrace. This results in the guys following him, which threatens Leonard's hope for some romantic time with Penny and the guys' friendship with Sheldon.

21m • 2009

When Sheldon learns that the guys tampered with his expedition data he got from the arctic, he leaves to Texas in disgrace. This results in the guys following him, which threatens Leonard's hope for some romantic time with Penny and the guys' friendship with Sheldon.

E2 • The Jiminy Conjecture

Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket.

20m • 2009

Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket.

E3 • The Gothowitz Deviation

Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.

20m • 2009

Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.

E4 • The Pirate Solution

Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as a third wheel.

20m • 2009

Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as a third wheel.

E5 • The Creepy Candy Coating Corollary

After overhearing that Wil Wheaton is entering a trading-card competition, Sheldon decides to enter it himself. Meanwhile, Penny sets up one of her friends on a date with Wolowitz.

20m • 2009

After overhearing that Wil Wheaton is entering a trading-card competition, Sheldon decides to enter it himself. Meanwhile, Penny sets up one of her friends on a date with Wolowitz.

E6 • The Cornhusker Vortex

Sheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship.

19m • 2009

Sheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship.

E7 • The Guitarist Amplification

A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism.

19m • 2009

A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism.

E8 • The Adhesive Duck Deficiency

With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.

20m • 2009

With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.

E9 • The Vengeance Formulation

After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.

18m • 2009

After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.

E10 • The Gorilla Experiment

Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.

20m • 2009

Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.

E11 • The Maternal Congruence

A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon and worrying if she'll approve of his romance with Penny.

19m • 2009

A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon and worrying if she'll approve of his romance with Penny.

E12 • The Psychic Vortex

Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university mixer.

19m • 2009

Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university mixer.

E13 • The Bozeman Reaction

When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

19m • 2009

When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

E14 • The Einstein Approximation

Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.

18m • 2009

Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.

E15 • The Large Hadron Collision

Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider (the world's largest and highest energy particle accelerator) in Switzerland on Valentine's Day.

20m • 2009

Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider (the world's largest and highest energy particle accelerator) in Switzerland on Valentine's Day.

E16 • The Excelsior Acquisition

Sheldon winds up in traffic court when he gets a ticket because of Penny.

20m • 2009

Sheldon winds up in traffic court when he gets a ticket because of Penny.

E17 • The Precious Fragmentation

When the guys find a ring from 'The Lord of the Rings' at a garage sale, it threatens to tear them apart.

20m • 2009

When the guys find a ring from 'The Lord of the Rings' at a garage sale, it threatens to tear them apart.

E18 • The Pants Alternative

Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.

20m • 2009

Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.

E19 • The Wheaton Recurrence

A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.

20m • 2009

A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.

E20 • The Spaghetti Catalyst

When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.

19m • 2009

When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.

E21 • The Plimpton Stimulation

Leonard and Sheldon compete for the attention of a famous female physicist.

20m • 2009

Leonard and Sheldon compete for the attention of a famous female physicist.

E22 • The Staircase Implementation

Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.

19m • 2009

Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.

E23 • The Lunar Excitation

While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.

19m • 2009

While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.

E1 • The Date Night Variable

With his friends on dates, Raj must face his loneliness. Also, Wolowitz is caught in an argument between Bernadette and his mom, even while he’s in space.

20m • 2012

With his friends on dates, Raj must face his loneliness. Also, Wolowitz is caught in an argument between Bernadette and his mom, even while he’s in space.

E2 • The Decoupling Fluctuation

When Sheldon learns that Penny is thinking about breaking up with Leonard, he tries to intervene. Meanwhile, in space, the other astronauts pick on Howard.

20m • 2012

When Sheldon learns that Penny is thinking about breaking up with Leonard, he tries to intervene. Meanwhile, in space, the other astronauts pick on Howard.

E3 • The Higgs Boson Observation

Amy feels threatened when Sheldon hires a young female assistant, and the pressure of being in space takes its toll on Wolowitz.

19m • 2012

Amy feels threatened when Sheldon hires a young female assistant, and the pressure of being in space takes its toll on Wolowitz.

E4 • The Re-Entry Minimization

When Wolowitz returns from space, he doesn’t get the hero’s welcome he expected. Meanwhile, Game Night turns into a battle of the sexes.

20m • 2012

When Wolowitz returns from space, he doesn’t get the hero’s welcome he expected. Meanwhile, Game Night turns into a battle of the sexes.

E5 • The Holographic Excitation

The gang celebrates Halloween at Stuart’s comic book store. Meanwhile, Leonard seduces Penny with science.

21m • 2012

The gang celebrates Halloween at Stuart’s comic book store. Meanwhile, Leonard seduces Penny with science.

E6 • The Extract Obliteration

Sheldon’s relationship with Stephen Hawking is threatened over a game of ‘Words with Friends,’ and Penny secretly enrolls in a class at the local college.

20m • 2012

Sheldon’s relationship with Stephen Hawking is threatened over a game of ‘Words with Friends,’ and Penny secretly enrolls in a class at the local college.

E7 • The Habitation Configuration

Wolowitz struggles with moving out of his mother’s house. Meanwhile, Sheldon is caught in the middle of an argument between Amy and Wil Wheaton.

21m • 2012

Wolowitz struggles with moving out of his mother’s house. Meanwhile, Sheldon is caught in the middle of an argument between Amy and Wil Wheaton.

E8 • The 43 Peculiarity

Raj and Howard try to to figure out why Sheldon disappears at 2:45 every afternoon. Meanwhile, jealousy arises in Penny and Leonard's relationship.

20m • 2012

Raj and Howard try to to figure out why Sheldon disappears at 2:45 every afternoon. Meanwhile, jealousy arises in Penny and Leonard's relationship.

E9 • The Parking Spot Escalation

When the University reassigns Sheldon’s parking spot to Wolowitz, their fight affects the whole gang.

19m • 2012

When the University reassigns Sheldon’s parking spot to Wolowitz, their fight affects the whole gang.

E10 • The Fish Guts Displacement

When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip.

21m • 2012

When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip.

E11 • The Santa Simulation

During a game, Sheldon revisits Christmas memories. Amy, Penny and Bernadette look for a date for Koothrappali.

20m • 2012

During a game, Sheldon revisits Christmas memories. Amy, Penny and Bernadette look for a date for Koothrappali.

E12 • The Egg Salad Equivalency

When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Wolowitz in trouble.

20m • 2012

When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Wolowitz in trouble.

E13 • The Bakersfield Expedition

As the guys don costumes and go on a road trip to a comic book convention, the ladies decide to stay home and try to interpret a comic book.

20m • 2012

As the guys don costumes and go on a road trip to a comic book convention, the ladies decide to stay home and try to interpret a comic book.

E14 • The Cooper/Kripke Inversion

Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.

19m • 2012

Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.

E15 • The Spoiler Alert Segmentation

A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements. while Howard is away, Raj helps Mrs. Wolowitz out.

20m • 2012

A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements. while Howard is away, Raj helps Mrs. Wolowitz out.

E16 • The Tangible Affection Proof

The guys search for a perfect Valentine's Day gift for their significant others and Stuart and Raj host a "lonely people" party at the comic book store.

20m • 2012

The guys search for a perfect Valentine's Day gift for their significant others and Stuart and Raj host a "lonely people" party at the comic book store.

E17 • The Monster Isolation

After a bad date, Koothrappali decides to never leave his apartment. Penny's acting skills impress Sheldon.

19m • 2012

After a bad date, Koothrappali decides to never leave his apartment. Penny's acting skills impress Sheldon.

E18 • The Contractual Obligation Implementation

Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers and Raj plans a date with Lucy.

19m • 2012

Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers and Raj plans a date with Lucy.

E19 • The Closet Reconfiguration

Howard considers whether or not he should open a letter from his father; Penny and Leonard host a 'grown-up' cocktail party.

19m • 2012

Howard considers whether or not he should open a letter from his father; Penny and Leonard host a 'grown-up' cocktail party.

E20 • The Tenure Turbulence

The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.

18m • 2012

The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.

E21 • The Closure Alternative

Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled. Raj discovers a secret about Lucy.

19m • 2012

Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled. Raj discovers a secret about Lucy.

E22 • The Proton Resurgence

Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform. meanwhile, Bernadette and Howard run into trouble while dog-sitting for Raj's pet.

20m • 2012

Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform. meanwhile, Bernadette and Howard run into trouble while dog-sitting for Raj's pet.

E23 • The Love Spell Potential

Amy and Sheldon's relationship takes a surprising turn during a game of 'Dungeons & Dragons'. Lucy and Koothrappali have an awkward date.

20m • 2012

Amy and Sheldon's relationship takes a surprising turn during a game of 'Dungeons & Dragons'. Lucy and Koothrappali have an awkward date.

E24 • The Bon Voyage Reaction

When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop.

19m • 2012

When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop.

E1 • The Hofstadter Insufficiency

With Leonard away, Sheldon and Penny spend quality time together sharing intimate secrets. Also, Wolowitz helps Raj get over his ex-girlfriend.

20m • 2013

With Leonard away, Sheldon and Penny spend quality time together sharing intimate secrets. Also, Wolowitz helps Raj get over his ex-girlfriend.

E2 • The Deception Verification

Leonard and Sheldon's friendship is tested; Wolowitz's relationship with his mom causes a threat to his masculinity.

20m • 2013

Leonard and Sheldon's friendship is tested; Wolowitz's relationship with his mom causes a threat to his masculinity.

E3 • The Scavenger Vortex

When the entire gang competes in a scavenger hunt designed by Raj, it brings out the best - and worst - in everyone.

20m • 2013

When the entire gang competes in a scavenger hunt designed by Raj, it brings out the best - and worst - in everyone.

E4 • The Raiders Minimization

Beverly Hofstadter writes a psychology book about Leonard which Penny buys and reads. Sheldon wants to ruin something for Amy after she ruins an Indiana Jones movie for him and Raj and Stuart try online dating.

20m • 2013

Beverly Hofstadter writes a psychology book about Leonard which Penny buys and reads. Sheldon wants to ruin something for Amy after she ruins an Indiana Jones movie for him and Raj and Stuart try online dating.

E5 • The Workplace Proximity

Amy starts working at Caltech which causes friction with Sheldon. Howard agrees with Sheldon who mentions this to Bernadette causing a big fight for the Wolowitzes.

18m • 2013

Amy starts working at Caltech which causes friction with Sheldon. Howard agrees with Sheldon who mentions this to Bernadette causing a big fight for the Wolowitzes.

E6 • The Romance Resonance

Sheldon's latest scientific breakthrough leaves him feeling like a fraud and a romantic gesture between Howard and Bernadette causes Penny to up her game with Leonard.

20m • 2013

Sheldon's latest scientific breakthrough leaves him feeling like a fraud and a romantic gesture between Howard and Bernadette causes Penny to up her game with Leonard.

E7 • The Proton Displacement

When Professor Proton asks Leonard for help with an experiment, Sheldon retaliates by befriending Proton's rival, Bill Nye.

19m • 2013

When Professor Proton asks Leonard for help with an experiment, Sheldon retaliates by befriending Proton's rival, Bill Nye.

E8 • The Itchy Brain Simulation

When a mistake comes to light, Sheldon makes Leonard walk a mile in his shoes; Penny decides to confront Raj's ex.

19m • 2013

When a mistake comes to light, Sheldon makes Leonard walk a mile in his shoes; Penny decides to confront Raj's ex.

E9 • The Thanksgiving Decoupling

Sheldon protests when the gang drags him to Mrs. Wolowitz’s house for Thanksgiving. Meanwhile, Penny and Leonard must deal with a mistake from her past.

18m • 2013

Sheldon protests when the gang drags him to Mrs. Wolowitz’s house for Thanksgiving. Meanwhile, Penny and Leonard must deal with a mistake from her past.

E10 • The Discovery Dissipation

Leonard and Amy help Sheldon cope with the shame he’s feeling after his accidental contribution to science is disproved. Meanwhile, Raj must stay with Howard and Bernadette for a week.

19m • 2013

Leonard and Amy help Sheldon cope with the shame he’s feeling after his accidental contribution to science is disproved. Meanwhile, Raj must stay with Howard and Bernadette for a week.

E11 • The Cooper Extraction

While Sheldon is in Texas, the rest of the gang realizes how much he has changed their lives as they decorate the apartment Christmas tree.

20m • 2013

While Sheldon is in Texas, the rest of the gang realizes how much he has changed their lives as they decorate the apartment Christmas tree.

E12 • The Hesitation Ramification

When Penny’s big acting break on NCIS is a bust, Leonard struggles to help her, which results in Penny asking Leonard a bold relationship question. Meanwhile, Sheldon tries to learn how to be funny.

20m • 2013

When Penny’s big acting break on NCIS is a bust, Leonard struggles to help her, which results in Penny asking Leonard a bold relationship question. Meanwhile, Sheldon tries to learn how to be funny.

E13 • The Occupation Recalibration

Sheldon tries to relax after he is forced to take a vacation. Meanwhile, Leonard struggles to be supportive of Penny after she quits her job, and Bernadette seeks Stuart’s help in replacing one of Howard’s comic books.

20m • 2013

Sheldon tries to relax after he is forced to take a vacation. Meanwhile, Leonard struggles to be supportive of Penny after she quits her job, and Bernadette seeks Stuart’s help in replacing one of Howard’s comic books.

E14 • The Convention Conundrum

After the guys can’t get Comic-Con tickets, Sheldon tries to hold his own convention and winds up spending a wild night with James Earl Jones.

20m • 2013

After the guys can’t get Comic-Con tickets, Sheldon tries to hold his own convention and winds up spending a wild night with James Earl Jones.

E15 • The Locomotive Manipulation

Sheldon and Amy go on a trip to wine country with Howard and Bernadette; Penny and Leonard rush Raj's dog to the vet.

19m • 2013

Sheldon and Amy go on a trip to wine country with Howard and Bernadette; Penny and Leonard rush Raj's dog to the vet.

E16 • The Table Polarization

Leonard buys a dining room table and it causes Sheldon to reevaluate the changes in his life. Meanwhile, Wolowitz is offered a chance to go back to space and Bernadette struggles with whether or not to encourage him.

19m • 2013

Leonard buys a dining room table and it causes Sheldon to reevaluate the changes in his life. Meanwhile, Wolowitz is offered a chance to go back to space and Bernadette struggles with whether or not to encourage him.

E17 • The Friendship Turbulence

Bernadette tries to negotiate peace between Sheldon and Wolowitz; Penny receives an embarrassing offer and Raj wants Amy to write to a woman on his behalf.

18m • 2013

Bernadette tries to negotiate peace between Sheldon and Wolowitz; Penny receives an embarrassing offer and Raj wants Amy to write to a woman on his behalf.

E18 • The Mommy Observation

When Sheldon visits his Mom in Houston, he is forced to confront a new reality. Meanwhile, Raj’s ‘Murder Mystery’ party starts some fights within the gang.

20m • 2013

When Sheldon visits his Mom in Houston, he is forced to confront a new reality. Meanwhile, Raj’s ‘Murder Mystery’ party starts some fights within the gang.

E19 • The Indecision Amalgamation

While Raj is wracked with guilt when he tries to date two women at once, Penny wrestles with whether to take a role in a cheesy movie and Sheldon is torn trying to choose between two gaming systems.

18m • 2013

While Raj is wracked with guilt when he tries to date two women at once, Penny wrestles with whether to take a role in a cheesy movie and Sheldon is torn trying to choose between two gaming systems.

E20 • The Relationship Diremption

Sheldon faces a personal crisis after deciding he’s wasting his time with string theory. Meanwhile, a double date between Raj, Emily and the Wolowitzes ends in embarrassment for Howard.

20m • 2013

Sheldon faces a personal crisis after deciding he’s wasting his time with string theory. Meanwhile, a double date between Raj, Emily and the Wolowitzes ends in embarrassment for Howard.

E21 • The Anything Can Happen Recurrence

To prepare for a date with Emily, Howard acclimatizes Raj to horror movies. Penny and Sheldon are upset when they discover Amy and Bernadette lied to avoid hanging out with them.

18m • 2013

To prepare for a date with Emily, Howard acclimatizes Raj to horror movies. Penny and Sheldon are upset when they discover Amy and Bernadette lied to avoid hanging out with them.

E22 • The Proton Transmogrification

As the gang celebrates Star Wars Day, Sheldon discovers he is having difficulty dealing with the death of Professor Proton.

20m • 2013

As the gang celebrates Star Wars Day, Sheldon discovers he is having difficulty dealing with the death of Professor Proton.

E23 • The Gorilla Dissolution

A bad day causes Penny to reevaluate her life choices – including Leonard. Meanwhile, Howard and Bernadette struggle to care for Mrs. Wolowitz, and Raj gets relationship advice from Sheldon.

18m • 2013

A bad day causes Penny to reevaluate her life choices – including Leonard. Meanwhile, Howard and Bernadette struggle to care for Mrs. Wolowitz, and Raj gets relationship advice from Sheldon.

E24 • The Status Quo Combustion

Sheldon get upset about his career, the destruction of the comic book store and Leonard and Penny's future living arrangements. Howard and Bernadette can't keep hold of a carer for his mother.

20m • 2013

Sheldon get upset about his career, the destruction of the comic book store and Leonard and Penny's future living arrangements. Howard and Bernadette can't keep hold of a carer for his mother.

E1 • The Matrimonial Momentum

After driving to Vegas to get married, Penny struggles with Leonard’s confession that he kissed another girl. Also, Sheldon doesn't know how to act after Amy pushes pause on their relationship.

19m • 2015

After driving to Vegas to get married, Penny struggles with Leonard’s confession that he kissed another girl. Also, Sheldon doesn't know how to act after Amy pushes pause on their relationship.

E2 • The Separation Oscillation

Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny's mind at ease. Also, Sheldon films a special episode of 'Fun with Flags' after his breakup with Amy

18m • 2015

Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny's mind at ease. Also, Sheldon films a special episode of 'Fun with Flags' after his breakup with Amy

E3 • The Bachelor Party Corrosion

The guys' science skills are put to the test when they get a flat tire during Leonard's bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family that she eloped with Leonard.

19m • 2015

The guys' science skills are put to the test when they get a flat tire during Leonard's bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family that she eloped with Leonard.

E4 • The 2003 Approximation

Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard and Penny.

18m • 2015

Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard and Penny.

E5 • The Perspiration Implementation

The guys take a fencing lesson from Barry Kripke and Sheldon finds himself in an awkward position when Kripke expresses interest in Amy.

18m • 2015

The guys take a fencing lesson from Barry Kripke and Sheldon finds himself in an awkward position when Kripke expresses interest in Amy.

E6 • The Helium Insufficiency

In the midst of a nation-wide helium shortage, Sheldon and Leonard take desperate measures to get the supplies they need. Also, Penny and Bernadette download a dating app on Amy's phone to try and find her a new man.

18m • 2015

In the midst of a nation-wide helium shortage, Sheldon and Leonard take desperate measures to get the supplies they need. Also, Penny and Bernadette download a dating app on Amy's phone to try and find her a new man.

E7 • The Spock Resonance

Wil Wheaton interviews Sheldon for a Star Trek documentary where he reveals the ring and his plan to propose to Amy. Bernadette wants to start renovating the house and the topic of starting a family together with Howard is brought up.

18m • 2015

Wil Wheaton interviews Sheldon for a Star Trek documentary where he reveals the ring and his plan to propose to Amy. Bernadette wants to start renovating the house and the topic of starting a family together with Howard is brought up.

E8 • The Mystery Date Observation

Sheldon, Wolowitz and Koothrappali post an online advertisement to find Sheldon a new girlfriend. Also, when Amy is coy with details about a guy she is dating, Penny and Bernadette decide to spy.

18m • 2015

Sheldon, Wolowitz and Koothrappali post an online advertisement to find Sheldon a new girlfriend. Also, when Amy is coy with details about a guy she is dating, Penny and Bernadette decide to spy.

E9 • The Platonic Permutation

Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily.

20m • 2015

Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily.

E10 • The Earworm Reverberation

Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously awkward date.

20m • 2015

Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously awkward date.

E11 • The Opening Night Excitation

After more than five years of dating, Sheldon and Amy spend their first night together. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars movie ticket.

20m • 2015

After more than five years of dating, Sheldon and Amy spend their first night together. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars movie ticket.

E12 • The Sales Call Sublimation

Penny gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf. Also, Sheldon and Koothrappali collaborate on an astronomical discovery.

18m • 2015

Penny gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf. Also, Sheldon and Koothrappali collaborate on an astronomical discovery.

E13 • The Empathy Optimization

After having to deal with a sick Sheldon, Leonard, Penny and the gang try to treat themselves to a Sheldon-free weekend.

18m • 2015

After having to deal with a sick Sheldon, Leonard, Penny and the gang try to treat themselves to a Sheldon-free weekend.

E14 • The Meemaw Materialization

Meemaw meets Amy, but it isn't all roses. Meemaw seems to have an axe to grind with her. Sheldon comes to Amy's defense, but not before Meemaw lets a little secret of his slip.

18m • 2015

Meemaw meets Amy, but it isn't all roses. Meemaw seems to have an axe to grind with her. Sheldon comes to Amy's defense, but not before Meemaw lets a little secret of his slip.

E15 • The Valentino Submergence

Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny grapple with getting older, Howard and Bernadette find a surprise in their hot tub and Raj is torn between Emily and the cute girl he met at the Comic Bookstore.

19m • 2015

Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny grapple with getting older, Howard and Bernadette find a surprise in their hot tub and Raj is torn between Emily and the cute girl he met at the Comic Bookstore.

E16 • The Positive Negative Reaction

When the gang finds out about Bernadette’s pregnancy, they celebrate by singing karaoke.

19m • 2015

When the gang finds out about Bernadette’s pregnancy, they celebrate by singing karaoke.

E17 • The Celebration Experimentation

After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest.

18m • 2015

After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest.

E18 • The Application Deterioration

Leonard, Sheldon, and Wolowitz run into problems when they file for a patent for their infinite persistence gyroscope. Also, Penny, Amy and Bernadette give Koothrappali dating advice when Emily reaches out to him after their breakup.

18m • 2015

Leonard, Sheldon, and Wolowitz run into problems when they file for a patent for their infinite persistence gyroscope. Also, Penny, Amy and Bernadette give Koothrappali dating advice when Emily reaches out to him after their breakup.

E19 • The Solder Excursion Diversion

Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Also, Koothrappali sells out Leonard and Wolowitz after they lie to their wives in order to attend an early screening of a movie.

20m • 2015

Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Also, Koothrappali sells out Leonard and Wolowitz after they lie to their wives in order to attend an early screening of a movie.

E20 • The Big Bear Precipitation

Sheldon spills a secret of Leonard’s when the two take a weekend cabin trip with Penny and Amy. Also, when Koothrappali goes overboard with pregnancy gifts, Wolowitz and Bernadette must draw the line.

18m • 2015

Sheldon spills a secret of Leonard’s when the two take a weekend cabin trip with Penny and Amy. Also, when Koothrappali goes overboard with pregnancy gifts, Wolowitz and Bernadette must draw the line.

E21 • The Viewing Party Combustion

Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.

18m • 2015

Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.

E22 • The Fermentation Bifurcation

The gang goes to a wine bar and runs into Penny’s old boyfriend, Zack. Also, Bernadette gets stuck spending the evening with Sheldon when she can’t go wine tasting with the group.

19m • 2015

The gang goes to a wine bar and runs into Penny’s old boyfriend, Zack. Also, Bernadette gets stuck spending the evening with Sheldon when she can’t go wine tasting with the group.

E23 • The Line Substitution Solution

Sheldon hires Stuart to spend the day with Amy when he’d rather go to a movie screening. Also, Leonard’s mother, Beverly, comes to town and Penny struggles to make a connection with her.

18m • 2015

Sheldon hires Stuart to spend the day with Amy when he’d rather go to a movie screening. Also, Leonard’s mother, Beverly, comes to town and Penny struggles to make a connection with her.

E24 • The Convergence Convergence

Chaos ensues when Leonard’s recently divorced parents, Alfred and Beverly, and Sheldon’s devoutly religious mother, Mary, come to town.

19m • 2015

Chaos ensues when Leonard’s recently divorced parents, Alfred and Beverly, and Sheldon’s devoutly religious mother, Mary, come to town.

E1 • The Conjugal Configuration

Sheldon and Amy's honeymoon runs aground in New York.

20m • 2018

Sheldon and Amy's honeymoon runs aground in New York.

E2 • The Wedding Gift Wormhole

Amy and Sheldon can't figure out their wedding gifts.

20m • 2018

Amy and Sheldon can't figure out their wedding gifts.

E3 • The Procreation Calculation

Penny and Leonard's marriage is put to the test.

19m • 2018

Penny and Leonard's marriage is put to the test.

E4 • The Tam Turbulence

Sheldon's childhood friend, Tam, visits.

18m • 2018

Sheldon's childhood friend, Tam, visits.

E5 • The Planetarium Collision

Sheldon sabotages Amy's career.

18m • 2018

Sheldon sabotages Amy's career.

E6 • The Imitation Perturbation

Howard dresses up as Sheldon for Halloween.

18m • 2018

Howard dresses up as Sheldon for Halloween.

E7 • The Grant Allocation Derivation

Leonard regrets his newfound authority at work.

18m • 2018

Leonard regrets his newfound authority at work.

E8 • The Consummation Deviation

Raj and Anu have trouble making things physical.

20m • 2018

Raj and Anu have trouble making things physical.

E9 • The Citation Negation

Sheldon and Amy's scientific theory hits a wall.

19m • 2018

Sheldon and Amy's scientific theory hits a wall.

E10 • The VCR Illumination

Sheldon seeks advice from his younger self.

20m • 2018

Sheldon seeks advice from his younger self.

E11 • The Paintball Scattering

The truth comes out on the paintball field.

18m • 2018

The truth comes out on the paintball field.

E12 • The Propagation Proposition

Penny's ex-boyfriend asks Leonard for a huge favour.

19m • 2018

Penny's ex-boyfriend asks Leonard for a huge favour.

E13 • The Confirmation Polarization

A rival team of physicists tries to take credit for Super Asymmetry.

19m • 2018

A rival team of physicists tries to take credit for Super Asymmetry.

E14 • The Meteorite Manifestation

Sheldon must choose between his friends or following the rules.

19m • 2018

Sheldon must choose between his friends or following the rules.

E15 • The Donation Oscillation

Penny tries to divert Leonard's plans to be a sperm donor.

20m • 2018

Penny tries to divert Leonard's plans to be a sperm donor.

E16 • The D & D Vortex

The guys try to crash Wil Wheaton's celebrity D&D game.

19m • 2018

The guys try to crash Wil Wheaton's celebrity D&D game.

E17 • The Conference Valuation

Sheldon wants to experiment on Howard's kids.

19m • 2018

Sheldon wants to experiment on Howard's kids.

E18 • The Laureate Accumulation

Amy and Sheldon try to win over Nobel laureates.

20m • 2018

Amy and Sheldon try to win over Nobel laureates.

E19 • The Inspiration Deprivation

The weight of winning a Nobel weighs heavy on Amy.

19m • 2018

The weight of winning a Nobel weighs heavy on Amy.

E20 • The Decision Reverberation

Penny encourages Leonard to stand up for himself.

18m • 2018

Penny encourages Leonard to stand up for himself.

E21 • The Plagiarism Schism

Amy and Sheldon try to take the high road for the Nobel Prize.

19m • 2018

Amy and Sheldon try to take the high road for the Nobel Prize.

E22 • The Maternal Conclusion

Leonard's mother is finally nice to him.

19m • 2018

Leonard's mother is finally nice to him.

E23 • The Change Constant

Sheldon and Amy await big news.

19m • 2018

Sheldon and Amy await big news.

E24 • The Stockholm Syndrome

In the series finale, the gang travels together into an uncharted future.

22m • 2018

In the series finale, the gang travels together into an uncharted future.

E1 • The Conjugal Conjecture

After Sheldon's mother and Leonard's father share an evening together, everyone deals with an awkward "morning after the night before" in the tenth season premiere.

21m • 2016

After Sheldon's mother and Leonard's father share an evening together, everyone deals with an awkward "morning after the night before" in the tenth season premiere.

E2 • The Military Miniaturization

Colonel Williams, an Air Force representative from the Department of Material Command, sits down for a talk with Howard.

18m • 2016

Colonel Williams, an Air Force representative from the Department of Material Command, sits down for a talk with Howard.

E3 • The Dependence Transcendence

Tensions rise when the guys struggle to complete their government project on time - and Sheldon tries an energy drink to stay awake. Meanwhile, Penny and Amy go to a geologist's "party".

19m • 2016

Tensions rise when the guys struggle to complete their government project on time - and Sheldon tries an energy drink to stay awake. Meanwhile, Penny and Amy go to a geologist's "party".

E4 • The Cohabitation Experimentation

When Amy's apartment floods, she proposes a "cohabitation experiment" with Sheldon. Meanwhile, Raj learns the gender of Howard and Bernadette's baby….before they do.

19m • 2016

When Amy's apartment floods, she proposes a "cohabitation experiment" with Sheldon. Meanwhile, Raj learns the gender of Howard and Bernadette's baby….before they do.

E5 • The Hot Tub Contamination

Sheldon threatens to break off their relationship when Amy refuses to adhere to his "bathroom schedule", putting their cohabitation experiment in jeopardy.

19m • 2016

Sheldon threatens to break off their relationship when Amy refuses to adhere to his "bathroom schedule", putting their cohabitation experiment in jeopardy.

E6 • The Fetal Kick Catalyst

Penny learns there are fans of her performance in "Serial Ape-ist" when she and Leonard attend a Comic Con event; Amy hosts a brunch at Penny's apartment; and Wolowitz makes an impulsive purchase.

18m • 2016

Penny learns there are fans of her performance in "Serial Ape-ist" when she and Leonard attend a Comic Con event; Amy hosts a brunch at Penny's apartment; and Wolowitz makes an impulsive purchase.

E7 • The Veracity Elasticity

Amy lies about repairs being made to her apartment so she can continue living with Sheldon; Leonard lets Penny decorate Sheldon's old room.

20m • 2016

Amy lies about repairs being made to her apartment so she can continue living with Sheldon; Leonard lets Penny decorate Sheldon's old room.

E8 • The Brain Bowl Incubation

After a successful experiment combining their genes, Sheldon is determined to procreate with Amy. Meanwhile, Raj is embarrassed with his new date's occupation.

18m • 2016

After a successful experiment combining their genes, Sheldon is determined to procreate with Amy. Meanwhile, Raj is embarrassed with his new date's occupation.

E9 • The Geology Elevation

Sheldon struggles to contain his jealousy when CalTech geologist Bert wins the MacArthur Genius Fellowship. Stephen Hawking returns for a guest appearance.

18m • 2016

Sheldon struggles to contain his jealousy when CalTech geologist Bert wins the MacArthur Genius Fellowship. Stephen Hawking returns for a guest appearance.

E10 • The Property Division Collision

A battle ensues when Leonard and Sheldon argue over who will get custody of their shared belongings. Christopher Lloyd guest stars.

19m • 2016

A battle ensues when Leonard and Sheldon argue over who will get custody of their shared belongings. Christopher Lloyd guest stars.

E11 • The Birthday Synchronicity

While Sheldon and Amy celebrate Amy's birthday, Howard and Bernadette welcome their new Baby Wolowitz.

19m • 2016

While Sheldon and Amy celebrate Amy's birthday, Howard and Bernadette welcome their new Baby Wolowitz.

E12 • The Holiday Summation

Sheldon and Amy visit Leonard and Penny for the first time since the holidays and share details about their terrible trip to Texas. Laurie Metcalf returns as Sheldon's mother.

20m • 2016

Sheldon and Amy visit Leonard and Penny for the first time since the holidays and share details about their terrible trip to Texas. Laurie Metcalf returns as Sheldon's mother.

E13 • The Romance Recalibration

When Leonard and Penny fight, Sheldon plays the unlikely peacemaker. Meanwhile, Howard and Raj try to fix a squeaky floorboard in the baby's room

18m • 2016

When Leonard and Penny fight, Sheldon plays the unlikely peacemaker. Meanwhile, Howard and Raj try to fix a squeaky floorboard in the baby's room

E14 • The Emotion Detection Automation

While Raj gets dating advice from his ex-girlfriends, Sheldon gets help reading people's feelings when he beta tests an emotion-detection invention.

19m • 2016

While Raj gets dating advice from his ex-girlfriends, Sheldon gets help reading people's feelings when he beta tests an emotion-detection invention.

E15 • The Locomotion Reverberation

Leonard and Howard try to distract Sheldon by giving him tickets to a historic railway, while Penny and Amy take Bernadette out for the night, leaving Raj and Stuart with the baby.

19m • 2016

Leonard and Howard try to distract Sheldon by giving him tickets to a historic railway, while Penny and Amy take Bernadette out for the night, leaving Raj and Stuart with the baby.

E16 • The Allowance Evaporation

Amy is furious when she learns Sheldon has shared intimate details of their relationship with people at the university, prompting their first fight since moving in together.

17m • 2016

Amy is furious when she learns Sheldon has shared intimate details of their relationship with people at the university, prompting their first fight since moving in together.

E17 • The Comic-Con Conundrum

When Raj is cut off from his father's fortune, he appoints Sheldon in charge of his finances to help him get out of debt. Meanwhile, Penny considers joining Leonard at Comic-Con.

19m • 2016

When Raj is cut off from his father's fortune, he appoints Sheldon in charge of his finances to help him get out of debt. Meanwhile, Penny considers joining Leonard at Comic-Con.

E18 • The Escape Hatch Identification

When Raj moves out of his apartment, Leonard and Penny offer him Sheldon's old room. Christine Baranski returns as Leonard's mother, Beverly.

19m • 2016

When Raj moves out of his apartment, Leonard and Penny offer him Sheldon's old room. Christine Baranski returns as Leonard's mother, Beverly.

E19 • The Collaboration Fluctuation

Leonard, Penny and Raj adjust to their new living arrangement, while Sheldon takes an interest in Amy's work.

18m • 2016

Leonard, Penny and Raj adjust to their new living arrangement, while Sheldon takes an interest in Amy's work.

E20 • The Recollection Dissipation

Sheldon pushes himself to the limit when he collaborates on projects with Leonard and Howard as well as Amy on the same day. Meanwhile, Bernadette nears the end of her maternity leave.

18m • 2016

Sheldon pushes himself to the limit when he collaborates on projects with Leonard and Howard as well as Amy on the same day. Meanwhile, Bernadette nears the end of her maternity leave.

E21 • The Separation Agitation

Howard and Bernadette have a hard time leaving Halley in daycare when Bernadette returns to work. Meanwhile, Bert introduces the gang to his new girlfriend, Rebecca.

19m • 2016

Howard and Bernadette have a hard time leaving Halley in daycare when Bernadette returns to work. Meanwhile, Bert introduces the gang to his new girlfriend, Rebecca.

E22 • The Cognition Regeneration

Leonard isn't thrilled when Penny considers taking a new job offered by her ex-boyfriend, Zack.

19m • 2016

Leonard isn't thrilled when Penny considers taking a new job offered by her ex-boyfriend, Zack.

E23 • The Gyroscopic Collapse

After Leonard, Sheldon and Howard celebrate the completion of their top secret Air Force project, they're met with an unpleasant surprise.

18m • 2016

After Leonard, Sheldon and Howard celebrate the completion of their top secret Air Force project, they're met with an unpleasant surprise.

E24 • The Long Distance Dissonance

On the tenth season finale, the gang is concerned when Sheldon's former admirer, Dr. Ramona Nowitzki resurfaces while Amy is away at Princeton.

19m • 2016

On the tenth season finale, the gang is concerned when Sheldon's former admirer, Dr. Ramona Nowitzki resurfaces while Amy is away at Princeton.

E1 • The Proposal Proposal

Amy answers Sheldon's proposal.

20m • 2017

Amy answers Sheldon's proposal.

E2 • The Retraction Reaction

Leonard gives an embarrassing radio interview.

20m • 2017

Leonard gives an embarrassing radio interview.

E3 • The Relaxation Integration

Amy tries to convince Sheldon he can be easy-going.

19m • 2017

Amy tries to convince Sheldon he can be easy-going.

E4 • The Explosion Implosion

Leonard's mom finds a new best friend in Penny.

20m • 2017

Leonard's mom finds a new best friend in Penny.

E5 • The Collaboration Contamination

Penny figures out the "secret" to Sheldon.

18m • 2017

Penny figures out the "secret" to Sheldon.

E6 • The Proton Regeneration

Sheldon auditions to be the new Professor Proton.

20m • 2017

Sheldon auditions to be the new Professor Proton.

E7 • The Geology Methodology

Sheldon secretly collaborates with Bert on a project.

19m • 2017

Sheldon secretly collaborates with Bert on a project.

E8 • The Tesla Recoil

Sheldon goes behind Leonard and Howard's backs.

18m • 2017

Sheldon goes behind Leonard and Howard's backs.

E9 • The Bitcoin Entanglement

The gang flashes back to 2010.

18m • 2017

The gang flashes back to 2010.

E10 • The Confidence Erosion

Sheldon and Amy develop a system for wedding planning.

20m • 2017

Sheldon and Amy develop a system for wedding planning.

E11 • The Celebration Reverberation

Sheldon plans a special themed dinner for Amy's birthday.

19m • 2017

Sheldon plans a special themed dinner for Amy's birthday.

E12 • The Matrimonial Metric

Sheldon and Amy use science to choose Best Man & Maid of Honour.

19m • 2017

Sheldon and Amy use science to choose Best Man & Maid of Honour.

E13 • The Solo Oscillation

Penny helps Sheldon figure out his next scientific move.

20m • 2017

Penny helps Sheldon figure out his next scientific move.

E14 • The Separation Triangulation

Raj discovers he's dating a married woman.

19m • 2017

Raj discovers he's dating a married woman.

E15 • The Novelization Correlation

Leonard asks his friends for feedback on his novel.

20m • 2017

Leonard asks his friends for feedback on his novel.

E16 • The Neonatal Nomenclature

Bernadette gives birth with the gang's help.

18m • 2017

Bernadette gives birth with the gang's help.

E17 • The Athenaeum Allocation

Barry Kripke interferes with Sheldon and Amy's wedding plans.

20m • 2017

Barry Kripke interferes with Sheldon and Amy's wedding plans.

E18 • The Gates Excitation

Penny gets the opportunity to host Bill Gates at work when his company wants to partner with her pharmaceutical company.

19m • 2017

Penny gets the opportunity to host Bill Gates at work when his company wants to partner with her pharmaceutical company.

E19 • The Tenant Disassociation

Leonard runs against Sheldon for President of the Tenants Association.

20m • 2017

Leonard runs against Sheldon for President of the Tenants Association.

E20 • The Reclusive Potential

Penny and Bernadette plan a bachelorette party for Amy.

20m • 2017

Penny and Bernadette plan a bachelorette party for Amy.

E21 • The Comet Polarization

Penny makes an astronomical discovery.

20m • 2017

Penny makes an astronomical discovery.

E22 • The Monetary Insufficiency

Sheldon goes to Vegas to win millions for science.

18m • 2017

Sheldon goes to Vegas to win millions for science.

E23 • The Sibling Realignment

Sheldon visits his older brother Georgie in Texas.

19m • 2017

Sheldon visits his older brother Georgie in Texas.

E24 • The Bow Tie Asymmetry

Amy's parents and Sheldon's family arrive for the wedding.

21m • 2017

Amy's parents and Sheldon's family arrive for the wedding.