Season 4

01 History 101 Episode 17th February 2013 As Jeff competes for spots in an overbooked 'History of Ice Cream' class, Abed copes with the looming end of their time at Greendale by retreating into a surreal mental 'happy place', while Annie and Shirley engage in school-wide pranks. 02 Paranormal Parentage Episode 214th February 2013 On the way to a Halloween party, the study group must free Pierce from his panic room and slowly comes to suspect that his mansion is haunted. 03 Conventions of Space and Time Episode 321st February 2013 Troy worries about losing Abed to a fellow Inspector Spacetime fan at a convention for the show, while Annie fantasizes about being married to Jeff. 04 Alternative History of the German Invasion Episode 428th February 2013 The study group contends with a group of German students who take over the study room. Chang makes his return to campus. 05 Cooperative Escapism in Familial Relations Episode 57th March 2013 Britta joins Jeff to see his estranged father on Thanksgiving. Shirley invites the rest of the group to spend the holiday with her judgmental in-laws. 06 Advanced Documentary Filmmaking Episode 614th March 2013 Greendale comes together to get to the bottom of Chang's amnesia, which Abed films as a documentary. Jeff, however, suspects Chang is faking it. 07 Economics of Marine Biology Episode 721st March 2013 Dean Pelton enlists the study group to beautify the campus to woo a wealthy student to Greendale. A class on teaching P.E. pits Shirley against Troy. 08 Herstory of Dance Episode 84th April 2013 Jeff sets out to embarrass Britta when she announces a dance for women's empowerment. Abed dreams of shuttling between two dates in one night. 09 Intro to Felt Surrogacy Episode 911th April 2013 Dean Pelton prompts the study group to use puppets to relive the traumatic events of a recent adventure. 10 Intro to Knots Episode 1018th April 2013 Jeff organizes a lovely holiday gathering at his apartment, but Annie secretly invites Professor Cornwallis to get in his good graces. 11 Basic Human Anatomy Episode 1125th April 2013 When Annie and Shirley learn that Leonard is actually holding the spot as the class valedictorian, they join forces to bring him down. 12 Heroic Origins Episode 122nd May 2013 Abed's research into the study group's history uncovers an overlooked series of chance encounters that led each of them to Greendale. 13 Advanced Introduction to Finality Episode 139th May 2013 A plan to celebrate Jeff's early graduation is unexpectedly disrupted by the study group's evil doppelgangers from the Darkest Timeline.