When Jeff introduces an element of randomness into Troy and Abed's housewarming party, reality splits into six timelines.

When the yam the study group was growing for biology class is killed, Troy and Abed are on the case.

Pierce and his closest friends are summoned to Hawthorne Labs to play a video game that will determine who will inherit his father's fortune.

The students of Greendale are drawn into an epic pillow fight as Troy and Abed start a war that threatens to destroy their unique friendship.

After Abed is caught trespassing at Greendale, he and his friends visit a psychiatrist.

As Dean Pelton films a new commercial for Greendale, the production takes a wild turn once he discovers that a famous alum has agreed to appear in it.

The study group stages an elaborate heist to break in to Greendale and free Dean Pelton from the clutches of Chang.

When a personality test suggests that one group member is a homicidal maniac, they use a series of scary Halloween stories to expose the killer.

Jeff agrees to represent Shirley in a case against Pierce to determine official ownership of their new sandwich shop.

Annie has second thoughts about moving in with Troy and Abed once she realizes that they expect her to live in a blanket fort.

The study group is slowly convinced to fill in for the Glee Club at Greendale's Christmas pageant.

After sending Troy and Britta on a date, Annie volunteers to keep Abed company in his Dreamatorium.

When Shirley agrees to coach Jeff in foosball, they realize that she bullied him mercilessly when they were kids.

When Britta falls for the human embodiment of the Subway sandwich chain, Shirley and Pierce hope to use the situation to their advantage.

After a classmate suddenly dies, the study group decides to host a memorial, but Jeff turns his speech into an angry anti-Greendale rant.

When a carnival comes to Greendale, Annie goes to great lengths to make sure that Britta doesn't contact her carnival worker ex-boyfriend.

As Jeff tries to keep Pierce from rejoining the study group, Dean Pelton faces off with Vice Dean Laybourne for control of Greendale.

As Annie competes with an overachieving rival in a Model United Nations competition, Jeff wrestles with his feelings for his ambitious friend.

The study group struggles to incorporate a fellow classmate while working on a project for Professor Kane's class.

The study group must work as celebrity impersonators at a bar mitzvah to pay off Abed's debt to a talent agency owner.

When a drag queen's song makes Hawthorne Wipes an iconic gay product, Pierce embraces it, until his homophobic dad shows up to squelch the idea.

When Shirley's remarriage to Andre threatens to put her dreams of starting a business with Pierce on hold, Britta steps in.