Simon Helberg, Kevin Sussman Jim Parsons Photo
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Photo Flash: THE BIG BANG THEORY's Holiday Episode, Set to Air 12/13
"The Santa Simulation" - Sheldon revisits some Christmas memories during a game of Dungeons and Dragons, while Penny, Bernadette and Amy try to find a girl for Koothrappali when he joins the girls for ladies' night, on THE BIG BANG THEORY, Thursday, Dec. 13 (8:00 - 8:31 PM, ET/PT) on the CBS Television Network.