Season 4

1. History 101

February 7, 2013 · 22m

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.

2. Paranormal Parentage

February 14, 2013 · 22m

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.

3. Conventions of Space and Time

February 21, 2013 · 22m

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.

4. Alternative History of the German Invasion

February 28, 2013 · 22m

The study group contends with a group of German students who take over the study room. Chang makes his return to campus.

5. Cooperative Escapism in Familial Relations

March 7, 2013 · 22m

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.

6. Advanced Documentary Filmmaking

March 14, 2013 · 22m

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.

7. Economics of Marine Biology

March 21, 2013 · 22m

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.

8. Herstory of Dance

April 4, 2013 · 22m

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.

9. Intro to Felt Surrogacy

April 11, 2013 · 21m

Dean Pelton prompts the study group to use puppets to relive the traumatic events of a recent adventure.

10. Intro to Knots

April 18, 2013 · 22m

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

April 25, 2013 · 22m

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

May 2, 2013 · 22m

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

May 9, 2013 · 22m

A plan to celebrate Jeff's early graduation is unexpectedly disrupted by the study group's evil doppelgangers from the Darkest Timeline.