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
Mark throws a pool party to mingle with all the girls and see them in sexy outfits; Some girls do better at mingling than others.
We meet Mark Orlando, firefighter, and newest occupant of the Burning Love mansion; Mark is the hunt for a new wife; The ladies are introduced and some are sent home.
A cocktail party is held and Mark mingles with the ladies; The girls vote on who gets kicked out.
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.
Thinking it's Linda, Bob accidentally kisses her sister, Gayle and now Gayle believes she and Bob are having an affair. The only way to end it is to get her interested in somebody else. Enter Dr. Yap, the Belcher's dentist, and hopefully, Gayle's next love interest and Bob's savior.moreless
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
While Annie, Troy and Abed try to help Britta stay away from an old ex, Jeff and Shirley attempt to find out who he is. Elsewhere, Vice Dean Laybourne turns to Dean Pelton for help with his campaign to get Troy to join the Air Conditioning Repair School.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