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Watch Stephen Hawking on The Big Bang Theory

The Big Bang Theory fans are in for a treat because the TV show's latest super geeky guest star is none other than Stephen Hawking.

Theoretical physicist, mathematician, and cosmologist Stephen Hawking guest stars on the April 5, 2012 episode of the CBS sitcom The Big Bang Theory. The character Howard Wolowitz (played by Simon Helberg) gets to work with Hawking, and Sheldon Cooper (played by Jim Parsons) is so envious that even dons a French maid's costume in an attempt to try to get his friend to introduce him to his hero.

Watch the preview clip for "The Hawking Excitation" episode, which airs tonight on CBS at 8:00 PM Eastern/7:00 PM Central. (Disclaimer: TechRepublic is a CBS Interactive brand.) Update: You can watch the full episode on the CBS.com's The Big Bang Theory site.

The Big Bang Theory has had a slew of other geek celebrity guests, including Stan Lee, Leonard Nimoy (well, his voice), LeVar Burton, Neil deGrasse Tyson, physicist Brian Greene, Nobel Prize winner George Smoot, and Sheldon's nemesis Wil Wheaton. Fans of the show, who would you like to see make a cameo?

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Mary Weilage is a Senior Editor for CBS Interactive. She has worked for TechRepublic since 1999.

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