Sheldon has a request for Penny on the fourth season premiere of The Big Bang Theory. Will she tag along on a date with him?
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Science pays off for Wolowitz on the season four premiere. He gets some solid use out of his robotic arm.
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Jim Parsons is seen here at The Big Bang Theory Comic-Con panel in 2010. He and his castmates dished on the new season at the event.
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A flashback to when Leonard first moved in with Sheldon and they signed the roommate agreement.
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Before there was Leonard, there was an even angrier roommate. Angry enough to write "Die Sheldon Die."
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A flashback to the nerds when they first met playing Gamecube together.
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Sheldon runs into a character played by Mayim Bialik on the 5/17/10 episode of The Big Bang Theory. Might she be the one for him?
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You gotta love this guest-starring appearance on The Big Bang Theory: that's former sitcom star Mayim Bialik!
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TBBT Quotes

I was expecting applause but I suppose stunned silence is equally appropriate.

Sheldon

Sheldon: Nothing more fun than a paradigm shifting evening of science.
Penny: (to Leonard) And you thought it was soaping me up in the shower.