It's Halloween in the office and Andy invites his college a cappella group to perform, which leads to a confrontation with his frenemy Broccoli Rob. Meanwhile, Dwight finds evidence that a madman is loose in the office and tries to track him down, and the first meeting of Jim's new job causes a fight with Pam.
Show: The Office
The everyday lives of office employees in the Scranton, Pennsylvania branch of the fictional Dunder Mifflin Paper Company.
Work Bus
The staffers hit the road in a rented bus when the building is deemed unsafe. Meanwhile, Nellie reaches out to Andy for help in adopting a baby, and Jim uses pie to spread cheer to Pam.
Finale
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.
A.A.R.M.
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".