This article is about the sitcom. For the cosmological model, see Big Bang. For the Family Guy episode, see Family Guy (season 9). For other uses, see Big Bang Theory (disambiguation).

The Big Bang Theory is an American sitcom created by Chuck Lorre and Bill Prady, both of whom serve as executive producers on the show. It premiered on CBS on September 24, 2007. Cast of characters in The Big Bang Theory. From left: Howard Wolowitz, Leonard Hofstader, Penny, Sheldon Cooper and Rajesh Koothrapali.The Big Bang Theory is an American sitcom created by Chuck Lorre and Bill Prady, both of whom serve as executive producers on the show. It premiered on CBS on September 24, 2007.

Set in Pasadena, California, the show is about two fictional Caltech geniuses, one an experimental physicist (Leonard Hofstadter) and the other a theoretical physicist (Sheldon Cooper), who live across the hall from an attractive blond waitress and aspiring actress (Penny). Leonard and Sheldon's geekiness and intellect are contrasted for comic effect with Penny's social skills and common sense. An aerospace engineer (Howard Wolowitz) and a particle astrophysicist (Rajesh Koothrappali) are their equally geeky and socially awkward co-workers and friends.

The show is produced by Warner Bros. Television and Chuck Lorre Productions. In March 2009, it was reported that The Big Bang Theory had been renewed for a third and fourth season by CBS. In August 2009, the sitcom won the best comedy series TCA award and Jim Parsons won the award for individual achievement in comedy.

When the third season premiered on September 21, 2009, it ranked as CBS's highest-rated show of that evening in the adults 18–49 demographic (4.6/10), along with a then series-high 12.83 million viewers.

As of September 2009[update], The Big Bang Theory airs on CBS on Mondays at 9:30 ET after Two and a Half Men, another show produced by Lorre. On May 19, 2010, it was announced that CBS would be moving the show to Thursdays at 8:00 ET for the 2010–2011 schedule.

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The Big Bang Theory Seasons 1-3 DVD Boxset