Big Bang Guest Stars

Big Bang Guest Stars

That's Katee Sackhoff and that's George Takei. Both guest star as themselves on the episode "The Hot Troll Deviation."
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The Zazzy Substitution Scene

The Zazzy Substitution Scene

Who needs human companionship?!? Not Sheldon, this character hopes, on the episode titled "The Zazzy Substitution."
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A Sheldon Diagram

A Sheldon Diagram

How can Sheldon live longer? That's what he tries to figure out on the episode "The Cruciferous Vegetable Amplification."
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Sheldon vs. Wil Wheaton

Sheldon vs. Wil Wheaton

Say hello to Sheldon's nemesis on The Big Bang Theory: oh, yes, it's Evil Wil Wheaton!
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Fourth Season Poster

Fourth Season Poster

The Big Bang Theory airs on a new night during its fourth season. But this poster promises the same old hilarity.
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Awkward Date

Awkward Date

Sheldon requires a chaperon on his first date when season four of The Big Bang Theory kicks off. Penny is chosen for the job.
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A Request for Penny

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

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

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

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

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

Nerdy Flashback

A flashback to the nerds when they first met playing Gamecube together.
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TBBT Quotes

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon