7 p.m. Sept. 22, NBC Where they left off: Shirley's baby was born, and Chang is not her baby daddy. Annie and Abed (Chicago native Danny Pudi) kissed after an epic paintball war. Pierce saved the day for Greendale Community College, but remains on the outs with the study group. This season: Pierce returns, but just how is unclear. John Goodman enrolls for several episodes as the imposing vice dean of the air-conditioning repair school. Michael K. Williams plays an ex-con biology teacher who targets Jeff. Plus, the group does a song-and-dance numbah. Or was that just for the promo? See a sneak peek video here.