Jim and Dwight are thrown off balance by the arrival of two young employees that the others dub "the new Jim" and "Dwight, Jr." Andy comes back from Outward Bound leadership training with a desire for vengeance on Nellie. Will Oscar adopt Angela's cat? Kevin saves a turtle.

Pam and Jim go to Roy's Wedding.

Andy learns he is related to Michelle Obama.

The Office hits the road.

Andy deals with a cappella drama.

Andy is forced to step up when his family comes under hard times -- Jack Coleman ("Heroes") guest stars.

Dwight faces his greatest professional handicap: Selling to women.

Angela discovers the truth.

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 Jim has forgotten his promise to take him along to the new job in Philadelphia. Meanwhile, Pete teaches Erin about his favorite movie Die Hard.

The office is infested with lice -- Julius Irving guest stars.

Dwight and Clark pose as father and son to make a sale.

Relationships are tested.

Dwight brings back old friends.

Pam's warehouse mural is defaced.

Erin (Ellie Kemper) is nervous for Andy's (Ed Helms) return.

Part 1 of 2. Andy returns from his long boat trip.

Part 2 of 2. Pam interviews for a job in Philadelphia with a manager who gives her deja-vu. Dwight brings Angela with him on a mission to clean his elderly Aunt Shirley. Andy returns from his long boat voyage.

Dwight travels home to the farm.

Everyone in the office is excited about promos running for the documentary.

Everyone is upset when the elevator goes out of service.

Dunder Mifflin Paper Airplane Contest.

Andy decides to pursue his dream. Part 1 of 2.

Andy decides to pursue his dream. Part 2 of 2.

Jim holds tryouts for the Assistant to the Assistant to the Regional Manager.

Jim holds tryouts for the Assistant to the Assistant to the Regional Manager.