The Hawking Excitation

The Hawking Excitation is the twenty-first episode of the fifth season of the CBS sitcom The Big Bang Theory. It is set to air on 5 April 2012.

Summary
When Howard gets the opportunity to work with Stephen Hawking, Sheldon will do whatever it takes to meet him.

Trivia

 * This is the first episode to feature Stephen Hawking as a guest star.
 * Amy will not appear in this episode, making this the first time in Season 5 that Amy is not appearing for two episodes back to back.