Cast of 'The Big Bang Theory'

• Kaley Cuoco as Penny
• Johnny Galecki as Leonard
• Simon Helberg as Howard Wolowitz
• Kunal Nayyar as Rajesh Koothrappali
• Jim Parsons as Sheldon

More 'The Big Bang Theory' Cast

More about 'The Big Bang Theory'

About 'The Big Bang Theory'

Premiered:

Sep 23, 2007

Original Network:

CBS

Premise of 'The Big Bang Theory'

Surprisingly, this sitcom has less to do with the creation of the universe than you might expect. Then again, it's from Chuck Lorre, co-creator of the perpetually randy "Two and a Half Men," so maybe: not such a big surprise. It's also no surprise (at least, to anyone who has seen "Beauty and the Geek") that Mensa-fied best friends Leonard and Sheldon may be able to tell you more than you want to know about quantum physics, but getting through most basic social situations totally baffles them. How lucky is it, then, that babe-alicious screenwriter-waitress Penny just moved next door to them? Will worlds collide? Does Einstein theorize in the woods?

All Upcoming Episodes of The Big Bang Theory'