The prospect of having a cavity filled sends Louise flying from the dentist's office and over to Aunt Gail's house for sanctuary. Linda sends Tina and Gene to join her, and bets that they won't be able to tolerate a weekend with their crazy aunt.moreless
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.
Jeff helps Duncan pursue Britta.
Annie and Professor Hickey work the Greendale bureaucracy to get a bulletin board back on the wall. Jeff, Chang, Shirley and Professor Duncan discover the challenges of planning a school dance.
Abed sets up a game of "Hot Lava" at the college as a going away present for Troy.
After Pierce Hawthorne's funeral, the gang retires to the study room. They are surprised with a communal polygraph test by Pierce's attorney to prove themselves innocent of his murder. They are individually quizzed in an effort to prove their involvement of the potential crime.moreless
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.
Bob gets a crash course in some of the 'not-so-academic' aspects of the collegiate experience when he agrees to be the substitute cook for a local frat house.
Susan asks Steve to help her husband Jason loosen up a little, this leads to him considering quitting his job at the hospital. Melanie starts a support group for the regulars at the bar, that don't know anything about sports.moreless
The gang celbrates Christmas together for the first time. As they gather at Jeff's place, Annie decides to invite Prof Cornwallis to dinner in an effort to boost their grades on their last test.moreless
Britta throws a Sophie B. Hawkins dance in protest of the Dean's Sadie Hawkins dance. Meanwhile, Annie and Shirley's respective blind dates for Abed leads him to attempt the classic sitcom trope of two dates in one night.moreless
Greendale recruits a rich community college "whale," who has the potential to be enrolled and spending cash on campus for over a decade.
Greendale comes together to unlock the mystery of Chang's amnesia, which Abed films as a documentary.