Community (2009)

"Cooperative Calligraphy," Season 2, Episode 8 (2010) Annie's pen goes missing, she is sure someone in the study group took it, and the group locks itself in the study room until it turns up. That is the whole setup: a bottle episode, the cheap one-set format most shows try to hide, which Community makes the main event as the searches escalate and the accusations get personal. It is the clearest proof that the show does not need parody to be funny. The concept is just seven people who know each other too well, stuck in one room while Troy and Abed ache to get out to a puppy parade.