The staff spends their summer competing in a weight loss challenge, and they become obsessed with diet and exercise. Michael and the new H.R. representative, Holly, build their new friendship while Jim finds himself missing Pam, who's busy pursuing her education in New York City. Andy and Angela deal with the repercussions from their recent engagement.

Holly leads a business ethics seminar as a result of Ryan's scandal, and when Michael encourages everyone to share their own unethical work behaviors, Meredith reveals something shocking. Meanwhile, Jim observes Dwight to see if he wastes company time.

Michael informs Holly that he will have to treat her badly while Jan is around, so that Jan doesn’t get jealous while she’s pregnant and fat. However, when Jan arrives, she has a surprise for everyone. Meanwhile, Dwight tests out Jan’s stroller to see if it’s worth twelve hundred dollars.

The Scranton branch is robbed, and Michael organizes an auction to raise money to replace all the stolen items. Michael and Holly take their relationship to the next level, while Dwight decides he needs to know exactly where he stands with Angela. Meanwhile, Jim runs into Roy, who suggests that maybe Pam’s new friendships at school aren’t so innocent.

Incorrectly assuming that Halloween at corporate is like Halloween in Scranton, Pam wears a costume to work. Michael and Holly take a trip together to New Hampshire after learning some big news from the corporate office. Back in Scranton, Dwight finds ways to annoy Andy.

Dwight and Jim receive poor customer service reports, and while Jim is merely disappointed, Dwight immediately suspects sabotage. Pam buys small Bluetooth phones for herself and Jim so they can talk all day without getting caught. Meanwhile, Andy and Angela finally agree on a wedding location.

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.

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 to get what they want. Meanwhile, Dwight takes Angela and Andy to Schrute Farms to work on their wedding plans.

Phyllis' 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.

The office is on eggshells because Andy still hasn't found out about fiancee Angela's affair with Dwight. When Michael spills the beans, Dwight and Andy take matters into their own hands. Meanwhile, Michael is nervous about being called down to corporate for a meeting with 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?

Dwight’s office safety drill goes horribly wrong leading to an office tragedy. Meanwhile, Pam worries about her parents’ failing relationship, and a roast of Micheal is set in motion where he gets more than he bargained for.

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 heads of the party planning committee - forget a birthday, with severe consequences. Meanwhile, Andy falls for someone he should not. First of two parts.

Michael and Pam continue their tour of the branches with Michael taking a lesson from their visit to Utica. Dwight and Jim struggle to fulfill their new party planning duties with a grumpy staff. Angela's new cat causes a stir. Second of two parts.

It’s Valentine’s Day at the office. Michael meets a mysterious woman at a Valentine’s blood drive. Dwight and Kevin pair up with single women at the office Lonely Hearts Party. Meanwhile, Jim and Pam are banished from the office for being too publicly affectionate, and have an awkward lunch with Phyllis and Bob.

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 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 (guest star Idris Elba) has some ideas of his own. Meanwhile, Jim's prank on Dwight has some unexpected results.

Michael's relationship with the new vice president (guest star Idris Elba) 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.

The situation between Jim and his new boss Charles get worse when they are competing in a parking lot soccer game. Michael tries to start his new business, but has trouble leaving his house....

Michael hosts a pancake lunch to try to gain new clients for his business. Pam and Ryan find it difficult to work in the same small space. Meanwhile, at Dunder Mifflin, Dwight and Andy become unlikely friends and Jim tries to figure out what a rundown is after Charles asks him to do one.

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.

The Michael Scott Paper Company's low prices continue to bleed business from Dunder Mifflin, but are so low the company can't attain profitability.

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 enters the cafe-disco business. Meanwhile, Pam and Jim decide to take 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.