As the Justice League

As the Justice League

The group goes all Justice League in this scene/episode of The Big Bang Theory. Seems about right for the show, doesn't it?
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Amy Farrah Fowler Picture

Amy Farrah Fowler Picture

A picture of Sheldon's love interest, Amy Farrah Fowler, on The Big Bang Theory.
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Bernadette Pic

Bernadette Pic

Sorry, it's not the best picture, but here's a photo of Bernadette from The Big Bang Theory.
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Penny, Bernadette and Amy

Penny, Bernadette and Amy

Penny, Bernadette and Amy are seen here during a night out. It's a scene from the episode "The Alien Parasite Hypothesis."
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Keith Carradine on TBBT

Keith Carradine on TBBT

Yes, that's Keith Carradine on The Big Bang Theory. He's played the character of Penny's dad.
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Return of Wil Wheaton

Return of Wil Wheaton

Wil Wheaton returns to The Big Bang Theory on the episode "The 21-Second Excitation." He once again causes problems for the fellas.
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Pretty, Funny Guest Star

Pretty, Funny Guest Star

Welcome to comedy, Eliza Dushku. The actress appears as a FBI agent on The Big Bang Theory episode "The Apology Insufficiency."
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Eliza Dushku on The Big Bang Theory

Eliza Dushku on The Big Bang Theory

Eliza Dushku guest stars on the November 4 episode of The Big Bang Theory. She plays a federal agent.
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The Irish Pub Formulation Scene

The Irish Pub Formulation Scene

Leonard tries to keep an affair secret from Sheldon on "The Irish Pub Formulation." This is a scene from that episode.
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Amy with Sheldon

Amy with Sheldon

Amy has a request of Sheldon on the episode "The Desperation Emanation." She wants to introduce him to her mother.
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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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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: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.