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.

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.

Dwight was very excited because he got to take Ryan on his first sales call. He couldn't wait to show Ryan how the sales are really done. Before that, the men took a little side trip to the Schrute family beet farm. Dwight thought it would be funny to leave Ryan on the farm.

Michael celebrates Phyllis' wedding shower by bringing two adult performers into the office, a stripper and Ben Franklin. Meanwhile, Karen confronts Pam about her past history with Jim.

It was the day of Phyllis and Bob's wedding. Pam was upset because she noticed Phyllis had basically stolen Pam's ideas for her and Roy's would-be wedding. Meanwhile, Michael was very excited to be in charge of pushing Phyllis's father's wheelchair down the aisle.

Phyllis walked into the office looking pale and shocked. A concerned staff surrounded her for comfort. She told them she had been flashed in the parking lot. Jim alerted the police and they already had three other incidents of flashing in the area. Michael didn't think much of it, because it was Phyllis.

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."

Pam is becoming more and more annoyed with Michael and his indecisiveness about ordering a desk chair. In Michael's defense, he's become distracted by his crush on the woman who is modeling the chair in the catalogue. He reminds Pam that since the infamous dinner party, he is now a single man.

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 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.

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.

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 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.

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.

Michael gets upset when Jim promises Phyllis that she can be the office Santa, but the office Christmas party may be overshadowed by some bad news from David Wallace.

Michael gets kicked out of the bar when he pulls out all the stops to impress a friend of Jim and Pam's. Meanwhile, Andy and Erin do their best to keep their relationship under wraps. Dwight rethinks his pre-natal contract with Angela.

Andy invites the entire office to his community theater production of Sweeney Todd in hopes that Erin will attend. Michael tries to put his jealousy aside and enjoy the performance while Jim and Pam struggle with their incompetent babysitter.

When Darryl takes an idea to corporate over his head, Michael freaks out. Everyone in the office is in a competitive mood as the Halloween costume contest gets underway. Meanwhile, Pam tries to get the truth out of Danny about their dating history.

Pam and Jim prepare for Cece's baptism. When Cece goes missing, Jim fears Angela has taken her.

A toast at Roy's wedding leads to Pam and Jim searching their relationships for buried secrets; Dwight reacts to Nellie's mandatory charity initiative.

When the party planning committee drops the ball on the annual Christmas party, Dwight gets everyone to celebrate with a traditional Schrute German Christmas. Darryl fears that Jim has forgotten to include him in the new job in Philadelphia. Pete teaches Erin about his favorite movie, Die Hard.

Dwight and Angela participate in a paper airplane contest and compete against each other. Meanwhile, Andy prepares for a potential acting job, and Jim and Pam utilize new skills.

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.