VIDEO: Sneak Peek - Tonight's Episode of CBS's THE BIG BANG THEORY (Video Content)

On tonight's episode of the CBS comedy THE BIG BANG THEORY titled 'The 43 Peculiarity,' Howard and Raj try to get to the bottom of why Sheldon disappears every afternoon at 2:45. Meanwhile, Leonard and Penny deal with jealousy in their relationship. Get a sneak peek below!

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