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Entertainment • TV Series

The Big Bang Theory

The Big Bang Theory is an American television sitcom created by Chuck Lorre and Bill Prady for CBS.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

The Big Bang Theory is an American television sitcom created by Chuck Lorre and Bill Prady for CBS. It ran for 12 seasons from 2007 to 2019 and follows a group of physicists and friends living in Pasadena, California. The series became one of the network’s long-running flagship comedies and spawned a prequel spin-off, Young Sheldon.

Premise

The series centres on a group of scientists and their personal and professional relationships. Much of the comedy comes from the contrast between their academic lives, social awkwardness, and interactions with neighbours and partners.

Production and broadcast

The show was created by Chuck Lorre and Bill Prady and broadcast on CBS. It aired from 2007 to 2019 across 12 seasons and 279 episodes.

Main characters

The ensemble includes Sheldon Cooper and Leonard Hofstadter, as well as Penny and other recurring friends and colleagues. The group’s relationships and changing living arrangements are central to the series.

Reception and legacy

The sitcom became a major hit for CBS and remained on air for over a decade. It later expanded into the prequel series Young Sheldon, extending the franchise beyond the original run.

Key facts

  • Created by Chuck Lorre and Bill Prady for CBS.
  • Aired from September 24, 2007 to May 16, 2019.
  • Ran for 12 seasons and 279 episodes.
  • Set in Pasadena, California.
  • Spun off the prequel series Young Sheldon.
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Canadian context

The Big Bang Theory aired widely in Canada and was part of the same English-language popular culture shared by many Canadian viewers, contributing to its familiarity and rerun presence on Canadian television.

Frequently asked questions

What is The Big Bang Theory?
It is an American television sitcom about a group of scientists and their friends, created by Chuck Lorre and Bill Prady for CBS.
When did The Big Bang Theory air?
It originally aired from September 24, 2007, to May 16, 2019.
How many seasons and episodes did it have?
The series ran for 12 seasons and 279 episodes.
Where is the show set?
It is set mainly in Pasadena, California.
Who are some of the main characters?
Major characters include Sheldon Cooper, Leonard Hofstadter, and Penny.
Did the series have a spin-off?
Yes. The franchise includes the prequel series Young Sheldon.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/The_Big_Bang_Theory
    Supports: Created by Chuck Lorre and Bill Prady; CBS sitcom; original run dates; 12 seasons; 279 episodes.
  2. Space.comhttps://www.space.com/25126-big-bang-theory.html
    Supports: Series ran for 279 episodes over 12 seasons; premiered in 2007 and ended in 2019; group of scientists premise.
  3. Wikipediahttps://en.wikipedia.org/wiki/List_of_The_Big_Bang_Theory_episodes
    Supports: Episode count; CBS sitcom identification; title pattern notes.
  4. Wikipedia (Spanish)https://es.wikipedia.org/wiki/The_Big_Bang_Theory
    Supports: Created by Chuck Lorre and Bill Prady; CBS run dates; 12 seasons; 279 episodes.