Michael wants to have a drama-free day at work on his last day before moving to Colorado. Meanwhile, Deangelo Vickers and Andy Bernard scramble to retain Michael's biggest clients.

One year later, Dunder Mifflin employees past and present reunite for a panel discussion about the documentary and to attend Dwight and Angela's wedding.

Dwight must makes amends with the office after his fire safety seminar goes awry; Michael tries to get his employees to relax; Andy becomes convinced that Pam and Jim are film gurus.

Michael stages an elaborate plan to finally get Pam and Jim over to his and Jan's place for a dinner party. Jim gets trapped into it and agrees to go. Dwight overhears and wants his invitation, too. Michael says he only has six wine glasses and with Andy and Angela going too, there's not enough room for Dwight.

Michael becomes convinced that an insurance salesman visiting the office is a part of the mafia, and Dwight and Andy accompany Michael to a meeting with him. Meanwhile, Kevin accidentally cancels Jim's credit card, while Jim and Pam are on their honeymoon in Puerto Rico.

Jim convinces Dwight that he needs to choose someone to act as an Assistant to the Assistant Regional Manager; the two subsequently hold tryouts for the position. After her daycare turns away her child, Angela is forced to bring her kid to work. Andy auditions for "The Next Great A Cappella Sensation".

In the season finale, Dunder-Mifflin holds a Casino Night in the warehouse to benefit charity. While Michael faces the task of juggling two dates, Jim is forced to ponder the reality of transferring to the Stamford branch and what that means for his relationship with Pam.

Michael screens his action film Threat Level Midnight to the office after eleven years of writing, shooting, re-shooting, and editing. The film features Michael as Agent Michael Scarn, Dwight as Scarn's sidekick, and Jim as archnemesis "Goldenface," as well as several people from Michael's past.

The office holds a garage sale in the warehouse. Michael decides to propose to Holly, and runs into trouble thinking of how to do it well.

After Pam's outburst at Beach Day, she and Jim had a talk and realized how much they both missed their friendship. Pam never regretted her speech she gave to Jim in front of the rest of the staff; in fact, she was happy that it only took her three years to summon the courage to say what was on her mind.

Toby leaves Dunder Mifflin, and Michael plans a huge goodbye party... out of joy. Angela refuses to help with it, so Michael turns to Phyllis. Dwight and Meredith harass Holly, their new HR representative.

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.

The Dunder Mifflin staff head to Niagara Falls for Jim and Pam's wedding, with the understanding that her pregnancy is a forbidden discussion topic, but Jim's slip of the tongue prods Michael to attempt damage control.

When Michael burns his foot with his George Foreman mini-grill, he requires the entire office staff to work around his new injury. When the workers aren't so keen on obliging, Michael gets angry and calls in a man in a wheelchair to put out the message that disabled people are people too. Meanwhile, Dwight acts stranger than usual, acting really nice and helpful towards Pam. It isn't until the end of the day when everyone realizes that the car accident Dwight was in earlier that day gave him a concussion (but was overshadowed by Michael's dramatization of his own burn), and Jim and Michael immediately take him to the hospital. Needless to say, Michael doesn't appreciate the extra attention that the doctors and nurses pay Dwight.

Michael was shocked when he received a call from Corporate wanting him to interview for a position. Michael was happy, but he also had other things on his mind. Beach Day was coming up and he was taking the crew out for some fun in the sun. Not before reminding Toby he couldn't go because somebody had to stay in the office.

Dwight becomes regional manager after Andy quits his job, Jim dedicates more time to his Dunder Mifflin job to save his marriage, and Angela has problems with her new living arrangements after her breakup with The Senator.

When Michael unintentionally outs a gay employee, he stumbles through a sensitivity mine-field. Also, we find out what happened with Jim and Pam.

Roy paced in the parking lot outside Dunder-Mifflin and then charged the building looking for Jim. When he spots Jim and rushed him, only to get pepper sprayed in the eyes by Dwight, who managed to spray everybody around him, as well.

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.

Michael trains Deangelo to take over his job of hosting the Dundie Awards, while Erin struggles with her dislike for her boyfriend, Gabe.

Roy stopped by Pam's desk to let her know how excited he was to see her art show. She reminded him that it was just a small show being put on by her art class. Pam later admitted she was very happy she was back together with Roy because it showed maturity. Jim feigns indifference to the reconciliation.

Michael could not be happier when Toby has to take a leave of absence and corporate sends Holly Flax to cover for him. Pam is forced to do a second Christmas party after Michael wants the party to be on the day Holly returns to Scranton. Meanwhile, Jim regrets agreeing to a snowball fight with Dwight.

Michael hosts a Christmas party at the office, but somehow manages to decrease the holiday cheer when he changes the arranged secret Santa pairs to a game of "Yankee Swap", where everyone gives their pre-bought presents to a different, random worker. To boost morale, Michael introduces vodka shots while the others compete for an iPod, Jim hopes that his sentimental present, meant for Pam, doesn't end up with Dwight, and Angela becomes enraged about Michael's party changes.

Since Dwight's departure, Andy had been clinging to Michael. Andy's antics had been wearing very thin on his co-workers. In fact, Andy left Jim actually wishing Dwight would come back.

Michael comes to believe the office might be cursed in the wake of a freak accident. After scrutinizing each of his staffers' religious beliefs, he organizes a charity 5K "fun run."