A Request for Penny

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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Feelin Good

Science pays off for Wolowitz on the season four premiere. He gets some solid use out of his robotic arm.
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Comic-Con Interview

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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The Roommate Agreement

A flashback to when Leonard first moved in with Sheldon and they signed the roommate agreement.
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Die Sheldon Die

Before there was Leonard, there was an even angrier roommate. Angry enough to write "Die Sheldon Die."
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Nerdy Flashback

A flashback to the nerds when they first met playing Gamecube together.
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Sheldon and Amy

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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Big Bang Scene

You gotta love this guest-starring appearance on The Big Bang Theory: that's former sitcom star Mayim Bialik!
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Mayim Bialik on The Big Bang Theory

This is a scene from the 5/17/10 episode of The Big Bang Theory. Yes, that's Mayim Bialik guest-starring in the sitcom.
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Judy Greer on Big Bang Theory

Judy Greer guest starred on The Big Bang Theory as Dr. Plimpton, a famous physicist that Sheldon invites to spend the weekend at the place.
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Back from Disney Land

Penny returns Sheldon to Leonard after their trip to Disney Land. The couple is sharing custody over the nerd.
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Leonard and Leslie

Sara Gilbert is seen here on The Big Bang Theory. She plays the character of Leslie.
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TBBT Quotes

Oh, Bernadette, please play my clarinet.

Raj's poem

Sheldon: I'll have a diet Coke.
Penny: Can you please order a cocktail? I need to practice mixing drinks.
Sheldon: Fine... I'll have a virgin Cuba Libre.
Penny: That's... rum and Coke without the rum.
Sheldon: Yes, and would you make it diet?