VIDEO: Sneak Peek - BIG BANG THEORY's Halloween Episode on CBS

On the next episode of the CBS comedy THE BIG BANG THEORY titled 'The Holographic Excitation, the gang celebrates Halloween at Stuart's comic book store. Meanwhile, Leonard seduces Penny with science. The episode airs Thursday, Oct. 25 (8:00 – 8:31 PM, ET/PT) on the CBS Television Network. Astronaut Buzz Aldrin makes a cameo appearance as himself. Get a sneak peek below!