The Study Group returns from summer break ready to tackle their fourth year of community college. Jeff is only a few credits away from graduating.
While on their way to Vicki's Halloween costume party, the study group makes a detour to Pierce's mansion when they learn he accidentally locked himself in his panic room
In support of Troy and Abed, the study group heads to InspecTiCon, the annual Inspector Spacetime Convention. Trouble begins when the group meets up with Abed's email pen-pal, Toby Davies.
After losing out in registration for The History of Ice Cream, the study group begins their European History class with Professor Noel Cornwallis
The study group heads to Shirley's for a Bennett-filled Thanksgiving. Jeff heads to his estranged father William's house, whom he hasn't seen since he was a child.
As the campus strives to get to the bottom of Chang's memory loss, Dean Pelton enlists the group to help secure a grant for further medical research and Abed films the activities for a documentary
Dean Pelton enlists the study group to make the campus more attractive in order to woo a wealthy student to Greendale. A class on how to teach P.E. pits Shirley against Troy.
When Dean Pelton plans a Sadie Hawkins dance at Greendale, Britta plans a competing Sophie B. Hawkins dance in protest, but the joke is on Britta. She confused Sophie B. Hawkins with Susan B. Anthony.
Dean Pelton prompts the study group to use puppets to relive the traumatic events of a recent adventure
Jeff organizes a holiday gathering at his apartment and Annie secretly invites Professor Cornwallis to get in his good graces. The atmosphere quickly deteriorates.
When Annie and Shirley learn that Leonard is actually holding the spot as the class valedictorian, they join forces to bring him down
Abed's research into the study group's history uncovers an overlooked series of chance encounters that led each of them to Greendale
A plan to celebrate Jeff's early graduation is unexpectedly disrupted by the study group's evil doppelgangers from the Darkest Timeline