Erik Charles Nielsen

Dean Pelton's army surplus party food sparks an outbreak of zombie-ism at the Greendale Halloween party.

When an old friend from Jeff's past appears unexpectedly, his friends discover that he was the one responsible for Jeff's disbarment.

As Pierce volunteers to compose a new school song, a cheating episode in Spanish class leaves Jeff defending Britta before a disciplinary tribunal.

As Annie (Alison Brie) competes with an overachieving rival in a Model United Nations competition, Jeff (Joel McHale) wrestles with his feelings for his ambitious friend. Meanwhile, Britta (Gillian Jacobs) finds herself at odds with Chang (Ken Jeong) when she is torn between her newly conventional life and her rebellious past.

As Annie recruits Abed and Troy for a psychology class experiment, Jeff and Shirley bond over their mutual fondness for gossip.

Señor Chang (Ken Jeong) has become the teacher from hell, and the group nominates Jeff (Joel McHale) to intervene. Meanwhile Troy (Donald Glover) and Abed (Danny Pudi) have trouble with a lab rat experiment, and Pierce (Chevy Chase) helps Shirley (Yvette Nicole Brown) with public speaking.