Community (2009)

Remedial Chaos Theory (season 3, 2011) A housewarming party, a pizza waiting downstairs and a roll of a die to decide who should go and fetch it. Community's second great bottle episode keeps the study group in one apartment but splits the evening into alternate timelines, replaying the same stretch of time with the group's dynamic rearranged on each pass. The single location is essential: because the setting, the people and the starting point never change, every small shift shows how the group's chemistry depends on each member. It is a structural stunt that doubles as a character study, and it is best watched after a season or two, when you know the group well enough to feel each difference.