“The Electric Can Opener Fluctuation” – Guest star Mary (Laurie Metcalf) returns as Sheldon’s mother. Sheldon (Jim Parsons), Leonard (Johnny Galecki), Koothrappali (Kunal Nayyar), and Wolowitz (Simon Helberg) convince Sheldon to return home, on the season three premiere episode of THE BIG BANG THEORY, Monday, Sept. 21 (9:30-10:00 PM, ET/PT) on the CBS Television Network.
Photo: Sonja Flemming/ CBS
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