STAGE TUBE: Sneak Peek - Scientist Stephen Hawking Guest Stars on Tonight's BIG BANG THEORY

On tonight's episode of the CBS comedy THE BIG BANG THEORY entitled 'The Hawking Excitation', when Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero. World-renowned Scientist Stephen Hawking guest stars as himself. The episode airs Thursday, April 5 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

On THE BIG BANG THEORY, 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' fiancée, the adorable microbiologist, Bernadette.

Get a sneak peek at tonight's episode below!