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.....

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 shortcomingselling 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 ; 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.

David Wallace asks Dwight to find a new part-time salesman who will fill in for Jim; Pam looks for a new desk mate; Erin searches for her birth parents.

When Pam asks the office to help her track down the vandal who defaced her mural, Dwight and Nellie spring to action. Darryl has difficulty dealing with the cleanliness habits of Jim in their shared Philly apartment. Meanwhile, Angela grudgingly allows Oscar and Kevin to attend her son's first birthday party.

The staff pairs off into pretend couples so they can take advantage of a Valentine's Day discount at a mini-mall; Erin claims she will break up with Andy when he returns, but Pete has his doubts.

During an interview for a job in Philadelphia, a manager gives Pam. Dwight asks Angela to join him on a mission; Andy returns from his trip.

The adventures of Dwight at his family beet farm and bed-and-breakfast come to light

Everyone in the office is excited when promos start running on TV for the documentary. - Philadelphia Phillies Ryan Howard guest stars.

The staffers are forced to use the stairs when the elevator goes out of service. Elsewhere, Dwight coerces Stanley to make a crucial sales call; Nellie and Toby help Pam and Jim with their marital challenges; and Angela supports her man. Roseanne Barr guest stars.

Dwight and Angela compete in an office-wide paper airplane contest where the winner gets a prize. A talent agent named Carla Fern helps Andy with his first acting role. Jim and Pam's new couple counseling skills are unleashed.

Andy works up the courage to quit his job and pursue his dreams of stardom. Meanwhile, Dwight at last earns his karate black belt and delights in his best day at the office; and Jim returns to Scranton in a bid to have quality time with Pam.

The staffers anticipate the TV premiere of their documentary. Meanwhile, Dwight plans to propose to Esther while overseeing interviews for an office position; Angela brings her baby to work; Andy attends auditions. Appearing: Clay Aiken; Mark McGrath; and Santigold.

As the office staff gets ready for the premier of their documentary, Jim and Dwight fill the position for the Assistant to the Assistant Regional Manager. Andy auditions for the reality TV show "The Next Great A Cappella Sensation." Jim expresses his love for Pam and Dwight expresses his love for Angela; Darryl dances with the office staff.

Months after the airing of the documentary, the workers of Dunder Mifflin, past and present, gather for a wedding and a final round of interviews. Mysteries are solved, hatchets are buried, pranks are prunked.

Months after the airing of the documentary, the workers of Dunder Mifflin, past and present, gather for a wedding and a final round of interviews. Mysteries are solved, hatchets are buried, pranks are prunked.