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Watch The Big Bang Theory Season 3 Episode 21 online

The Big Bang Theory Season 3 Episode 21 rainierland, Leonard and Sheldon compete for the attention of a famous female physicist. ...

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The Big Bang Theory Season 3 Episode 22
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Season: 3 Episode: 22

Diffuse: 2010-05-17

Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator. ...

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