When does The Big Bang Theory return?

The Big Bang Theory aired from September 24, 2007, to May 16, 2019, running for 12 seasons and 279 episodes. The show originally centered on five characters living in Pasadena, California. It received mixed reviews throughout its first season, but reception was more favorable in the second and third seasons. A prequel series based on Sheldon Cooper, Young Sheldon, aired from 2017 to 2024, with Parsons as the narrating adult Sheldon.