A Dunder Mifflin weight loss initiative causes the branch to diet and become obsessed with their weight. Michael pursues a friendship with his new HR rep, Holly. Jim misses Pam who attends art school in New York. Dwight Andy and Angela tend to unfinished business.
After Ryan's recent scandal at corporate, Holly hold's a business ethics seminar. The meeting gets out of control when Michael lets everyone speak freely about their unethical behaviour at work. Meanwhile, Jim makes Dwight comply with the company's "time theft" policy.
Michael practices for the birth of Jan's baby by having Dwight go over possible birthing scenarios. Meanwhile, Michael tells Holly that he must pretend to dislike her for Jan's benefit.
Michael helps Pam get a part time job at corporate so she can afford to go to art school. Michael and Holly get an early start at the office on their date night. After the office gets robbed, Michael decides to hold an auction to raise money for all the items lost.
Pam is embarrassed when she is the only person at corporate wearing a costume on Halloween. Holly and Michael take the long trip to Nashua after they get some shocking news from corporate. Meanwhile, Dwight torments Andy and tries to get under his skin.
Dwight and Jim are shocked when they get the results of the annual customer survey report. Pam and Jim decide they want to spend every minute together using their bluetooth phones. Meanwhile, Angela and Andy pick an unusual location for their wedding.
Michael is thrilled when he learns that David Wallace is sending him to Canada for a business trip, and wants to bring both Andy and Oscar with him. Jim misses Pam and he can't wait until she returns from art school.
A mysterious person in the office has made a huge mess in the microwave and will not clean it up. Meanwhile, Michael has to come to terms with the fact that there have been certain personnel changes in his staff without his knowing, specifically - Toby is back.
Oscar informs Michael that the office must spend a $4300 surplus or lose it in next year's budget. When Michael opens up the floor for suggestions, factions break out and officemates square off against one another in order to get what they want.
Phyllis's Moroccan-themed holiday party goes up in flames when Meredith's hair catches on fire and Michael is forced to deal with the accident. Meanwhile, Dwight corners the market on the hottest toy of the Christmas season.
Andy finds out that Angela and Dwight have been having an affair and he challenges Dwight to a duel. Michael goes to corporate in New York for a meeting with David Wallace.
Michael and Dwight go undercover to do a bit of industrial espionage on a paper company competitor. Meanwhile, the rest of the office holds a debate to settle the question: is Hilary Swank hot?
After Dwight's fire safety seminar goes awry, he must make amends to the stressed-out office. Michael tries a number of ways to get his employees to relax before discovering that he is the number one stressor at work, so he insists on a no-holds-barred roast of himself.
Michael goes on a speaking tour of the other branches to explain Scranton's relative success, accompanied by his driver, Pam. Back at the office, Dwight and Jim - now the heads of the party planning committee - forget a birthday, with severe consequences.
Michael and Pam continue their tour of the branches with Michael taking a lesson from their visit to Utica. Dwight and Jim struggle to fulfil their new party planning duties with a grumpy staff. Angela's new cat causes a stir.
It's Valentine's Day and happy couple Jim and Pam are not invited when all of the single people in the office decide to throw a Lonely Hearts party. Meanwhile, Michael thinks he may have a connection with the woman giving blood next to him at the office blood drive.
Michael causes a huge problem in the office when he comes up with the idea to put "golden tickets" into packages of paper for clients to redeem for discounts. Andy, Jim and Pam give Kevin differing advice on wooing a woman.
Michael has big plans for his 15th anniversary party at Dunder Mifflin, but is in for a shock when the new, no-nonsense vice president has some ideas of his own. Meanwhile, Jim's prank on Dwight has some unexpected results.
Michael's relationship with the new vice president becomes increasingly tense, as Michael finds an excuse to goof off even more than usual. Meanwhile, Pam faces the challenge of a new copier and Kelly develops a crush.
After getting off on the wrong foot with his new supervisor, Charles, Jim finds himself face to face with the new boss in a soccer game in the Dunder Mifflin parking lot. Meanwhile, Michael, afraid to face the workday, has trouble leaving his house.
Dwight and Andy strike up an unlikely friendship and plan a hunting trip. Regional Supervisor Charles asks Jim for a "rundown", and Jim spends his day trying to figure out what that is. Michael hosts a Paper & Pancakes luncheon.
Dwight's loyalty to Michael is tested when he finds a new hero in Charles. Meanwhile, Andy tries to provide for all of Jim's emotional needs.
Michael's new company struggles to make early morning deliveries while the office tries to get their expense reports in on time after Angela enforces Dunder Mifflin's policy.
Michael has to mediate a dispute within his new sales team. Meanwhile, trouble brews in the office when several employees take the term "casual" Fridays too loosely.
Michael decides to open a cafe-disco in his old office. Pam and Jim are planning a secret trip.
It's the annual Dunder Mifflin company picnic and Michael and Holly are reunited, and Michael has some big plans for her. Meanwhile, the office competes in the picnic's volleyball tournament.