The Big Bang Theory2007 | TV Show

Cast & Crew  |  Episode Guide

Two nerdy physicists share an apartment and an unlikely friendship with their beautiful neighbor with whom one of them is infatuated. Like the universe after the big bang, the show's popularity expanded, thanks to breakout star Jim Parsons, along with the (more…)

Premiered: September 24, 2007

Rating: TV-PG

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Season 3, Episode 22 The Staircase Implementation

First Aired: May 17, 2010

Leonard tells Penny the story of how he met Sheldon.

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The Plimpton Stimulation

Season 3, Episode 21

May 10, 2010

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The Lunar Excitation

Season 3, Episode 23

May 24, 2010

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