"The Stockholm Syndrome" is the series finale of the American television sitcom The Big Bang Theory. It is the twenty-fourth episode of the twelfth season and the 279th overall episode of the series. Directed by Mark Cendrowski, it first aired on CBS on May 16, 2019. The episode received 24.75 million total viewers and garnered positive reviews. In the episode, Sheldon (Jim Parsons) and Amy (Mayim Bialik) receive a Nobel Prize, and Penny has become pregnant.