Legendary Astrophysicist Stephen Hawking made a sitcom cameo on The Big Bang Theory. Sheldon Cooper, the brainy, pretentious main character was ecstatic to meet his personal hero. Co-star, Simon Helberg, who plays Howard Wolowitz on the show, said Hawking showed great comedic timing:
Tonight, Professor Stephen Hawking shows off his understanding of comedy in relation to time, or comedic timing to the layman, on a new BBT!
— Simon Helberg (@simonhelberg) April 5, 2012
Watch the full clip below: