Community (2009)

"Epidemiology," Season 2, Episode 6 (2010) A school Halloween party, a biohazard that gets eaten by mistake and a dean who locks everyone inside add up to a zombie outbreak, and the episode commits to it with horror-movie homages from start to finish. It works as an entry point because the premise needs no backstory: anyone who has seen a zombie movie knows the rules, so the jokes come from watching each character fail at survival in their own particular way. A strong pick for an October watch.