The entire Scranton branch becomes involved in a corporate weight-loss initiative, complete with inter-branch competition. Michael turns the office into a military boot camp, while Dwight adopts extreme methods to help colleagues "slim down." Meanwhile, Jim and Pam must deal with distance after she decides to take an art class in New York. Angela continues her secret affair... but not with her official boyfriend.

As the second month of the competition arrives, the obsession with weight increases. Creed distributes "miracle" berries, Kevin develops dubious strategies, and Dwight... well, he does it himself. Meanwhile, Pam struggles to adjust to the new town, while Jim prepares to surprise her with an unexpected and touching gesture. The episode closes with one of the series' most beautiful proposals, in the midst of rain and traffic, but with a huge heart.

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, things get out of hand. Meanwhile, Jim messes with Dwight by requiring him to follow the Dunder Mifflin "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 will pretend to dislike her for Jan's benefit.

Michael and Holly have sex for the first time, and Michael holds a fund-raiser for the office after it is burglarized. Dwight confides in Phyllis after Andy and Angela set a wedding date, and Jim runs into Pam's ex-fiancé Roy.

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.

Michael has to spend the office surplus by they end of the day, but he can't decide between a copier or new chairs. Dwight plays a dirty trick on Angela as they prepare for Andy and Angela's wedding on the beet farm.

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?

When Dwight stages a fire emergency to test the office's preparedness, panic erupts. Stanley has a heart attack, and Michael realizes that the stress he caused could have real consequences. So he decides to hold stress management sessions... which, of course, makes everything worse. Meanwhile, Pam and Jim discover that Andy's ideas for a romantic video aren't quite right.

Michael tries to lighten the mood by having each colleague tell what he can't stand about the others-a guaranteed disaster. Meanwhile, Dwight must deal with the consequences of his actions, while Andy tries to insert himself into the group with a bizarre film. And as tensions mount, Jim and Pam find comfort in each other, proving once again that they are the most solid couple in corporate chaos.

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.

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.

A mystery woman at the office blood drive catches Michael's eye. Dwight and Kevin both find women at the "Lonely Hearts Party," while Jim and Pam are forced to leave because of PDAs—so they have lunch with Phyllis and Bob.

Michael's idea to use "Golden Tickets" for prizes for clients causes a problem in the office. Kevin seeks advice from Andy, Jim, and Pam about dating.

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.

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

Tension and disillusionment begin to emerge as Michael, Pam, and Ryan move the Michael Scott Paper Company into a cramped "workspace" at the business park.

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.

At the company picnic, Michael and Holly are reunited for the first time since their split. The rest of the staff competes in games, such as the volleyball tournament.