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Watch The Big Bang Theory Season 5 Episode 21 online via TV Fanatic with over 5 options to watch the The Big Bang Theory S5E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, and Google Play.

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Episode Details

The Big Bang Theory Season 5 Episode 21: "The Hawking Excitation"

Wolowitz gets to work with Stephen Hawking this week, meaning Sheldon will do anything at all to meet his hero.

The Big Bang Theory Season 5 Episode 21 Quotes

That's amazing. You'll be like his pit crew.

Leonard

Howard: So, I got the craziest email this morning.
Raj: I hate to burst your bubble, dude, but those penile enlargement pills do not work.
Howard: Believe me I know.

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