As the Greendale study group gathers in the library, they wonder whether they will see their old friend Pierce, who left the study group in a huff after last spring's paintball game. Jeff quickly butts heads with their new biology teacher Professor Kane and is kicked out of class - leading to a crisis within the group about whether they will all stay together. Dean Pelton is feeling empowered after a summer at Dean Camp but finds a new nemesis in Vice Dean Laybourne, dean of the highly regarded Air Conditioning Repair Annex at Greendale. Written by NBC Publicity

As Chang settles into his new job as a campus security officer, Britta is overwhelmed with feelings of civil disobedience when a friend is taken hostage in a foreign country. Meanwhile, Annie enlists the study group to help her defeat her new friend Annie Kim in a Model United Nations competition, while Professor Cligoris struggles to maintain decorum. Written by NBC Publicity

As the study group sets to work on their first big assignment in biology - a terrarium - they are driven to distraction over how they should pair off to do their project. Elsewhere on campus, Chang patrols the school grounds looking for signs of trouble and imagines himself in a noir detective mystery. Written by NBC Publicity

When Troy and Abed decide to share an apartment, they host a party for the group, which takes on an altered reality as several scenarios play out. Written by NBC Publicity

During her pre-Halloween party, Britta gets everyone to tell a spooky story so that she can find out which member of the study group scored out as a psychopath on their psychology profiles.

When Pierce learns that he and his Hawthorne wipes have become extremely popular, he decides to throw a big party... until his overbearing father, Cornelius Hawthorne shows up and puts the kibosh on the plans. Meanwhile, Troy finds himself being courted by Vice Dean Laybourne and his secretive Air Conditioning Repair Annex, as well as Greendale's resident janitor, Jerry. Written by NBC Publicity

The study group pitches in to help when Annie decides to move in with Troy Abed, but the plan breaks down when she becomes frustrated by their fun-loving lifestyle. Elsewhere, Dean Pelton discovers Jeff at the mall and blackmails him into spending a lovely afternoon together. Written by NBC Publicity

When the school board asks Dean Pelton to make a new commercial for the school, he enlists the study group to star in his production. As he gets swept away with the project, more of the student body is pulled into the fray, including Magnitude, Fat Neil, Garrett, Leonard, Star-Burns and even Greendale alum and genuine celebrity, Luis Guzman. Meanwhile, Abed films all the activities for a documentary. Written by NBC Publicity

When a group of arrogant students commandeer the foosball table at school, Jeff and Shirley unite to defeat them. Meanwhile, Annie accidentally breaks Abed's new limited edition Dark Knight DVD and claims that someone broke into the apartment and stole it. Things snowball out of control when Abed thinks he knows who took the DVD and sets about getting it back. Written by NBC Publicity

When the Greendale Glee Club is unexpectedly sidelined, the school's effervescent choir director Cory Radison sets about recruiting the study group members to fill in. Skeptical at first, they eventually fall under his hypnotic spell - one-by-one - singing and dancing their way to the annual Christmas Pageant. Written by NBC Publicity

Andre proposes that he and Shirley remarry and a wedding date is set. Britta and Annie get busy planning the wedding and Jeff prepares to give a wedding speech - while Troy and Abed get ready to be normal for the occasion. Meanwhile, Pierce and Shirley pitch a sandwich shop idea to Dean Pelton for the Greendale cafeteria. Written by NBC Publicity

The members of the Study Group take jobs as celebrity impersonators to pay off Abed's debt to a celebrity impersonator business, but can Jeff be Ryan Seacrest without his fragile ego spiral out of control?

Shirley and Pierce recruit Britta to sabotage the new Subway restaurant in the cafeteria. Jeff finds a hate-letter in the school locker he never realized he had. Troy and Abed begin constructing a pillow fort, but thanks to some outside manipulation Troy splits off to build his own blanket fort. Written by The TV Archaeologist

The United Forts of Pillowtown, headed by Abed, is at war with the Legit Republic of Blanketsburg, ruled by Troy. Annie sets up a hospital zone to treat casualties on both sides. Britta takes a stab at war-photography. Jeff tries to reunite two former friends turned mortal enemies using sarcasm. Written by The TV Archaeologist

While Britta struggles to stay away from her old carny boyfriend, Jeff becomes obsessed with their relationship. Meanwhile, the dean stops by Troy and Abed's to recruit Troy for the dean of the school of refrigeration.

The study group takes a three hour lunch. Annie suggests Abed shows her how the Dreamatorium works so Troy and Britta can be together. But their 'Inspector Spacetime' simulation soon turns into a hospital bound drama in which Abed takes on the personalities of the other group members. Written by The TV Archaeologist

Presented like an episode of Law and Order (1990), the study group attempts to find out who squashed their biology project: a yam. Troy and Abed become detectives, Shirley is their boss, Jeff and Annie pose as prosecuting attorneys, while Pierce is an informant and Britta a lab tech. Written by The TV Archaeologist

A fellow student has died and Biology class has been canceled, meaning everyone has to retake it in summer school. When the memorial service turns into a riot, Chang is granted special authoritative powers.

When Abed claims the Dean has been replaced by a doppelgänger he is forced to take psychiatric treatment. Naturally, the rest of the study group joins him at his session with Dr. Heidi.

The Study Group must help Hawthorne win a video game so that he can claim his inheritance, but somebody may be out to ensure that he loses.

The Study Group, now known as the Greendale Seven, launches a plot to rescue the real dean Pelton and end Chang's reign of terror over Greendale.

Jeff faces an old nemesis as Shirley and Pierce square off in Greendale court, Abed succumbs to his evil alter ego, and Troy decides to meet his destiny at air conditioning school.