Scoop: THE BIG BANG THEORY on CBS - Today, January 21, 2013

"The Holographic Excitation" - The gang celebrates Halloween at Stuart's comic book store. Meanwhile, Leonard seduces Penny with science, on a rebroadcast of THE BIG BANG THEORY, on a special night and time, tonight, Jan. 21 (8:30 - 9:00 PM, ET/PT) on the CBS Television Network. Astronaut Buzz Aldrin makes a cameo appearance as himself. (Originally broadcast 10/25/12.)

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.