The Big Bang Theory is one of CBS's biggest shows of all time, running for 12 seasons and spawning a successful spin-off, Young Sheldon. Heading into the 3rd season, the show faced a critical juncture and introduced Bernadette Rostenkowski, who revitalized the main character dynamics, particularly saving Howard from stagnant plotlines. Discover how Bernadette's character played a crucial role in the show's longevity and success.