THE BIG BANG THEORY Season 5 Episode 21 The Hawking Excitation Promo : “The Hawking Excitation” – When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero, on THE BIG BANG THEORY, Thursday, April 5 (8:00-8:31 PM, ET/PT) on the CBS Television Network. World-renowned Scientist Stephen Hawking guest stars as himself.
