E12 • The Matrimonial Metric

Amy answers Sheldon's proposal.

E2 • The Retraction Reaction

Leonard gives an embarrassing radio interview.

Leonard gives an embarrassing radio interview.

E3 • The Relaxation Integration

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

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

E4 • The Explosion Implosion

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

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

E5 • The Collaboration Contamination

Penny figures out the "secret" to Sheldon.

Penny figures out the "secret" to Sheldon.

E6 • The Proton Regeneration

Sheldon auditions to be the new Professor Proton.

Sheldon auditions to be the new Professor Proton.

E7 • The Geology Methodology

Sheldon secretly collaborates with Bert on a project.

Sheldon secretly collaborates with Bert on a project.

E8 • The Tesla Recoil

Sheldon goes behind Leonard and Howard's backs.

Sheldon goes behind Leonard and Howard's backs.

E9 • The Bitcoin Entanglement

The gang flashes back to 2010.

The gang flashes back to 2010.

E10 • The Confidence Erosion

Sheldon and Amy develop a system for wedding planning.

Sheldon and Amy develop a system for wedding planning.

E11 • The Celebration Reverberation

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

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.

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.

Penny helps Sheldon figure out his next scientific move.

E14 • The Separation Triangulation

Raj discovers he's dating a married woman.

Raj discovers he's dating a married woman.

E15 • The Novelization Correlation

Leonard asks his friends for feedback on his novel.

Leonard asks his friends for feedback on his novel.

E16 • The Neonatal Nomenclature

Bernadette gives birth with the gang's help.

Bernadette gives birth with the gang's help.

E17 • The Athenaeum Allocation

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

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.

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.

Leonard runs against Sheldon for President of the Tenants Association.

E20 • The Reclusive Potential

Penny and Bernadette plan a bachelorette party for Amy.

Penny and Bernadette plan a bachelorette party for Amy.

E21 • The Comet Polarization

Penny makes an astronomical discovery.

Penny makes an astronomical discovery.

E22 • The Monetary Insufficiency

Sheldon goes to Vegas to win millions for science.

Sheldon goes to Vegas to win millions for science.

E23 • The Sibling Realignment

Sheldon visits his older brother Georgie in Texas.