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Community, season 3 episode 5 «Horror Fiction in Seven Spooky Steps»: air date October 27, 2011. Episode overview, season trailer and the cast of Community.
When Britta runs anonymous personality tests on everyone for a psychology class, one of the test results seems to indicate that someone in the group is deeply disturbed. At the group's Halloween pre-party, she enlists Jeff to help draw out the potential sociopath and the two of them lure everyone into telling their favorite horror stories. The results are spookey.