In the ninth and final season opener, two young employees arrive, but the staffers label them as new versions of Jim and Dwight. Meanwhile, Andy returns from leadership training and targets Nellie for revenge; Oscar mulls over adopting Angela's cat; and Kevin saves a turtle.
The wedding toast of Pam's ex-fiance Roy causes Pam and Jim to examine their relationship for buried secrets. Dwight stubbornly protests Nellie's mandatory charity initiative by supporting the Taliban and agreeing to live by their severe laws. Clark hits on Erin by dangling a fake newscaster job; Andy also takes the bait.
Andy flaunts his genealogy when he discovers he's related to Michelle Obama. Meanwhile, Darryl struggles in his new post; Dwight teaches Erin a new language to wow her boyfriend's family; and Nellie tries to persuade Pam that Jim's having an affair.
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.
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.
Money problems plague Andy's family. Meanwhile, Dwight guests on a local radio show, so the staffers harass him with outrageous phone calls; and Kevin unearths a big secret about Oscar.
Dwight faces his greatest professional shortcoming—selling to women. As a result, the lady staffers step up to give him advice so he can successfully sell to an important female client. Meanwhile, Angela suspects her paramour is cheating; Andy uses technology to connect with the others from his boat; and Toby tries to convince the men to grow mustaches.
Angela discovers the harsh truth about her husband's affair with Oscar, so she reaches out to Dwight for help. Meanwhile, Jim requests a favor from Stanley and Phyllis; Pam begins painting a mural in the warehouse; and Pete creates a tower made out of complaint cards.
When the office holiday party fizzles, Dwight throws a traditional Schrute German Christmas. Meanwhile, Darryl suspects that Jim has forgotten to include him in a new job opportunity in Philadelphia, and Pete teaches Erin about the film "Die Hard."
When Pam unwittingly brings lice into the office, Meredith gets blamed and Dwight goes on a quest to annihilate the tiny insects. Elsewhere, Jim courts a potential associate in Philadelphia, and three staffers snoop into Darryl's love life.
Clark brings an espresso maker to the office, and the staff embraces the new device. Meanwhile, Dwight and Clark pretend to be a father-and-son duo to land a sale; and Darryl goes on an interview at Jim's company, where Pam drops by unexpectedly.
Dwight tries to stop Darryl from moving to Jim's start-up company. Elsewhere, Jim misses his daughter's first recital, to Pam's dismay; Nellie spills the beans about Pete and Erin. Also: A behind-the-scenes look at the documentary comes into view.
Dwight is tasked with hiring a part-time salesman to be Jim's subst