Sharp-tongued lawyer Jeff Winger finds himself returning to school at Greendale Community College. He accidentally creates a study group when attempting to get closer to a pretty student.
As the Dean creates a Hunger Games-style competition for admission into a History of Ice Cream class, Abed grows anxious about graduation. (S4, ep 1)
The study group's Halloween plans are put on hold when Pierce locks himself in the panic room of his "haunted" mansion. (S4, ep 2)
At the Inspector SpaceTime Convention, Abed finds a new "soulmate," Shirley and Pierce join a focus group and Annie pretends to be Jeff's wife. (S4, ep 3)
The Study Group loses access to the study room to the German foosballers. Chang returns to campus, suffering from Changnesia. (S4, ep 4)
While Jeff and Britta spend Thanksgiving with Jeff's newly-discovered father and brother, the rest of the group spend it with Shirley. (S4, ep 5)
Abed makes a new documentary chronicling Greendale's research into Changnesia, as well as Jeff's efforts to prove that Chang is faking it. (S4, ep 6)
Dean Pelton and Annie try to land a "whale" student while Jeff is assigned to keep Pierce occupied. Meanwhile, Troy and Shirley take a PE course. (S4, ep 7)
While the Dean sets up a Sadie Hawkins dance, Britta puts together a competing Sophie B Hawkins dance. (S4, ep 8)
Dean Pelton prompts the study group to use puppets to relive the traumatic events of a recent adventure. (S4, ep 9)
Jeff organises a lovely holiday gathering at his apartment but Annie secretly invites Professor Cornwallis to get in his good graces. (S4, ep 10)
When Annie and Shirley learn that Leonard is actually holding the spot as the class valedictorian, they join forces to bring him down. (S4, ep 11)
Abed's research into the study group's history uncovers an overlooked series of chance encounters that led each of them to Greendale. (S4, ep 12)
A plan to celebrate Jeff's early graduation is unexpectedly disrupted by the study group's evil doppelgangers from the Darkest Timeline. (S4, ep 13)