Scoop: THE BIG BANG THEORY on CBS - Today, January 24, 2013

"The Extract Obliteration" - Sheldon's relationship with Stephen Hawking is threatened over a game of "Words with Friends," and Penny secretly enrolls in a class at the local college, on a rebroadcast of THE BIG BANG THEORY, tonight, Jan. 24 (8:00 - 8:31 PM, ET/PT) on the CBS Television Network. Renowned scientist Stephen Hawking lends his voice to the episode. (Originally broadcast 11/1/12.)

Leonard and Sheldon are brilliant physicists - wizards in the laboratory, but socially inept outside of it. Enter beautiful, free-spirited neighbor, Penny, who aims to teach them a thing or two about life. While Leonard spends his days looking for love, Sheldon is quite content video-chatting with platonic partner Amy Farrah Fowler, or playing Star Trek 3D Chess with their ever-expanding universe of friends, including fellow scientists Koothrappali and Wolowitz, and Wolowitz' new wife, the adorable microbiologist Bernadette.