Community: Season 2, Episode 8

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When Annie's pen goes missing, she suspects a member of her own study group is the thief. On a mission to find the pen and solve the mystery, the group takes a self-imposed lockdown and Jeff takes the lead in conducting the search. Meanwhile, Troy and Abed are itching to get out of the study room to make it to the Greendale Puppy Parade taking place in the quad.