The Entire Gang!

The Entire Gang!

The gang is all here. And we mean everyone! Check out this scene from the fifth season premiere of The Big Bang Theory.
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Big Bang Theory Premiere Scene

Big Bang Theory Premiere Scene

This is awkward for everyone. Raj and Penny stand in front of the boys on the fifth season premiere.
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Leonard and Priya in the Shower

Leonard and Priya in the Shower

Don't look for Leonard and Priya to slow down on season five. Not even 7,500 miles can end their relationship!
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Nerds on a Mission

Nerds on a Mission

The men have a mission on the episode "The Zarnecki Incursion." They must find the person who hacked into Sheldon's online game account.
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Hi, Couple!

Hi, Couple!

Can Leonard be friends with Penny while dating Priya? It might be a challenge.
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The Cohabitation Formulation Scene

The Cohabitation Formulation Scene

You're looking at a photo from "The Cohabitation Formulation." Raj's sister returns during the episode.
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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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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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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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Leonard and Leslie

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

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