S2, EP15 "Early 21st Century Romanticism"
Abed and Troy vie for the attention of the college librarian; Britta befriends a student she thinks is gay; Jeff winds up hosting an impromptu party at his apartment.
S2, EP13 "Celebrity Pharmacology 212"
Annie stages an anti-drug play at a middle school; Señor Chang comes to the rescue when Pierce's over-the-top behavior threatens to ruin the production.
S2, EP12 "Asian Population Studies"
The group members debate whether to add Annie's crush, who recently enrolled at Greendale, or Senor Chang to the group; Shirley's ex-husband (Malcolm-Jamal Warner) comes back into the picture, and she has big news for everyone.
S2, EP11 "Abed's Uncontrollable Christmas"
Abed decides he and the group must rediscover the meaning of Christmas when he awakes in stop-motion animation; Britta and Jeff become concerned about Abed's mental health.
S2, EP10 "Mixology Certification"
When the study group members realize Troy is turning 21, they decide to take him to the bars; Shirley pulls down photos of her that are posted at the bar; Abed talks to a fellow sci-fi nerd.
S2, EP9 "Conspiracy Theories and Interior Design"
When Dean Pelton starts checking class schedules, he discovers that Jeff has listed a class that doesn't exist; Abed and Troy build an elaborate blanket fort.
S2, EP8 "Cooperative Calligraphy"
When Annie's pen goes missing, she suspects that a member of the group took it; the group institutes a self-imposed lockdown until it is found.
S2, EP7 "Aerodynamics of Gender"
Abed discovers his inner "mean girl"; Jeff and Troy embrace a Zenlike spirituality when they uncover a secret trampoline on campus; Pierce lands in the hospital.
S2, EP6 "Epidemiology"
Greendale students, including Pierce, ingest a biohazardous substance at a Halloween party that turns them into zombies; some must save themselves and the school when they are locked in with infected students.
S2, EP5 "Messianic Myths and Ancient Peoples"
Shirley asks for Abed's creative input for a religious film; a group of students Pierce's age recruits him.
S2, EP4 "Basic Rocket Science"
Dean Pelton asks the study group to clean and refurbish the Greendale flight simulator; after an accidental launch, Abed must navigate a safe return.
S2, EP3 "The Psychology of Letting Go"
The study group comforts Pierce after the death of his mother; Professor Duncan tries to take over the anthropology class.
S2, EP2 "Accounting for Lawyers"
Jeff falls into old habits after reconnecting with Alan (Rob Corddry), a former law firm colleague; Abed, Annie and Troy look for dirt on Alan.
S2, EP1 "Anthropology 101"
As the new semester begins, the study group gathers to tackle Anthropology 101; Jeff struggles to establish decorum with Britta and Annie; Señor Chang decides to enroll as a student so he can join the study group.