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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In Drag

This is a photo from the episode "The Wheaton Recurrence." There's really not much to say about it, is there?
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Wil Wheaton Bowling

A picture after Wil Wheaton just bowled as Sheldon prepares to counter.
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Penny and Leonard Bowling

Penny and Leonard go bowling and Leoanrd sure does seem to be celebrating something.
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Wheaton Calls Out Sheldon

Wil Wheaton calls out Sheldon as the two of them meet in the bowling alley.
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The Big Bang Theory Season 3 Quotes

Wolowitz: Sheldon. You remember the first few weeks; we were looking for magnetic monopoles and not finding anything, and you were acting like an obnoxious, giant dictator?
Raj: I thought we were going to be gentle with him.
Wolowitz: That's why I added the "tator"

Wolowitz [after seeing Penny jump Leonard]: Damnit, I should have gone over and said we were back
Raj: Yeah, it was "first come, first serve."