Deck the Halls
performed by The Roches

Brennan Huff (Ferrell) is a sporadically employed thirty-nine-year-old who lives with his mother, Nancy (Mary Steenburgen, Melvin and Howard). Dale Doback (Reilly) is a terminally unemployed forty-year-old who lives with his father, Robert (Richard Jenkins, Six Feet Under). When Robert and Nancy get married and move in together, Brennan and Dale are forced to live with each other as stepbrothers. Their narcissism and downright aggressive laziness eventually tear the family apart--their parents eventually divorce due to Brennan and Dale's wild antics, specifically the destruction of Robert's sailboat while shooting a "music" video. Eventually, these two middle-aged, immature, overgrown boys begin to grow-up and work to bring their parents back together.

The office staffers hold a "Secret Santa" gift exchange at their Christmas party. Jim got Pam's name for the first time this year, and puts a great deal of effort into getting her the perfect gift. Michael buys a video iPod as his gift to Ryan, far exceeding the $20 limit. He is disappointed by the handmade item he receives from Phyllis and introduces a "Yankee Swap", in which someone can choose to steal someone else's gift or open a new one. Jim is left feeling uncertain about the fate of his special present for Pam while the staff guns for the iPod. Although Pam ends up with the iPod at the end of the swap, she elects to trade the iPod for Jim's gift that was meant for her to show her appreciation. While she goes through the various aspects of her gift, Jim sneaks a letter that he wrote for her into his pocket. After ruining his staff's mood, Michael disobeys company policy by buying an obscene amount of alcohol for the Christmas party to compensate. Everyone ends up having a good time, with the exception of Angela, who is furious that she received no appreciation for her efforts towards arranging the Christmas party. The episode ends with a drunken Meredith exposing herself to Michael, who takes a picture, and then quickly flees.