The Big Bang Theory theme song

The Big Bang Theory theme song is a song used in the couch gag for the episode "Looking for Mr. Goodbart", in a parodied version, talking about The Simpsons.

Lyrics
The whole Fox network was in a hot dense state when nearly 14 billion years ago, they began a TV show. Then, Bart tried to sell his soul. Lisa turned to vegetables. Grandpa started fighting bulls. Springfield built a wall. The Who played on the top. Carl, Lenny, Barney, Moe A fat, bald guy who hollers D'oh. It all started with The Simpsons. D'oh!

Trivia

 * A lot of episodes are references in the lyrics, including Bart Sells His Soul, Lisa the Vegetarian, Million-Dollar Abie, and A Tale of Two Springfields.