Before there was Leonard, there was an even angrier roommate. Angry enough to write "Die Sheldon Die."
Added:
A flashback to the nerds when they first met playing Gamecube together.
Added:
Sara Gilbert is seen here on The Big Bang Theory. She plays the character of Leslie.
Added:
Penny and Leonard come outside to see Sheldon trapped by a net from the security system they installed.
Added:
As usual, Leonard and Penny get into an argument. This time? About psychics.
Added:
Sheldon helps decorate the tree and wants to add the bust of Sir Isaac Newton, which he argues is more Christmasy than Jesus.
Added:
After years of trying to get his mother's affection, Leonard finally gets a hug from Beverly (Christine Baranski). All it took was getting her drunk.
Added:
Bernadette (Melissa Rauch) joins the guys for lunch at work as she begins to bond with Leonard over his work.
Added:

TBBT Quotes

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

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.