'Big Bang Theory' lands 'dream' guest star

'Big Bang Theory' lands 'dream' guest star
'Big Bang Theory' lands 'dream' guest star, Stephen Hawking to guest star on 'Big Bang Theory', A show about nerds gets a guest star that some might call the biggest geek of the universe. "The Big Bang Theory" is getting a visit from Stephen Hawking. The renowned theoretical physicist will guest-star on the April 5 episode of the CBS comedy, the network