Dean Pelton lets two designers test their new social networking application at Greendale, leading to a war among the students; Professor Hickey decides to go underground until the battle ends.
Abed sets up a game of "Hot Lava" at the college as a going away present for Troy.
Annie gets Jeff to help her in the hunt for the "Asscrack bandit". One student returns from the dead, while Shirley comes with news of another persons death.
Jeff starts his position as a teacher. Abed gets the rest of the group to take a class about Nicolas Cage.
Jeff returns to Greendale a year after graduation on a mission. He meets the rest of the group and finds out what has happened to them since graduation.
The study group plans to rescue Dean Pelton with an elaborate heist during Chang's birthday party.
Shirley and Pierce's sandwich shop is chosen to replace the campus Subway, but a conflict ensues between the partners and Jeff has to argue on Shirley's behalf in Dean Pelton's version of court. Meanwhile, Troy is recruited by the Air Conditioning Repair Annex.moreless
When Abed becomes convinced that there's a conspiracy and Dean Pelton is an imposter, he is required to see a therapist or risk being sent to jail.
While the study group deals with the death of a beloved classmate, Chang finds an opportunity to take control over campus security when the memorial service transforms into a riot.
When the group's science project is destroyed, they decide to hold a trial to find the criminal, which a reluctant Professor Kane (Michael K. Williams) presides. While Troy and Abed believe they have discovers the perpetrator, Jeff soon realizes there's much more to the story than is believed.moreless
Annie and Abed spend some quality time together in the Dreamatorium for a simulation of "Inspector Spacetime". The game soon transforms into an examination of not only the study group, but also a deeper look into Abed's mind and personality.moreless
The epic battle of Pillowtown vs. Blanketsburg continues at Greendale. The group is forced to take sides, while Jeff tries to form a compromise between Troy and Abed.
When a Subway opens in Greendale's cafeteria, Pierce and Shirley plot to shut it down. Meanwhile, Vice Principle Laybourne starts to turn Abed and Troy against each other while in the midst of another school-wise blanket fort.moreless
Andre asks Shirley to remarry him and they set a date. Annie and Britta prep for the wedding while Jeff prepares the wedding speech. Shirley and Pierce present the idea of a sandwich shop to be added to the Greendale cafeteria to Dean Pelton.moreless
When the Glee club goes missing, the study group is asked to fill in their positions to save the annual Holiday Pageant
Jeff and Shirley bond over foosball; after breaking Abed's limited edition Dark Knight DVD, Annie claims that someone broke into the apartment and stole it.
Dean Pelton directs a commercial starring the study group and a collection of the school's most colorful characters. Abed, meanwhile, shoots a behind-the-scenes documentary of the entire affair.
As the new school year starts, the group is back together and choice to take Biology. Jeff and their ex-convict Biology teacher instantly start off on a bad foot, which leads to strife within the group. Meanwhile, Senor Chang is living in the air vents and is given a new position of authority from the Dean, who has to make cut-backs due to the intimidating Vice-Dean's choice on spending arrangements.moreless