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The CSIs uncover a complex counterfeiting operation after a bellboy is found murdered at one of Miami's hottest hotels.
10:36 — The socially stunted guys are nervous when Penny invites them to a party she's hosting.
Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.
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This year, the stars wore subtle (but important) accessories.