The Big Bang Theory eventually revealed what became of Tam, one of the few people Sheldon Cooper tolerated as a kid genius on Young Sheldon.

Johnny Galecki starred in "The Big Bang Theory" for over a decade. While many of his costars continued acting after the series ended, Galecki had other plans.

From sitcom stars to new adventures, we're diving into the post-"Big Bang Theory" careers of Jim Parsons, Kaley Cuoco, Johnny Galecki, and the entire beloved cast. Discover what these talented actors have been up to since the show's finale in 2019.

Before he joined the cast of Young Sheldon, Lance Barber played a completely different character on The Big Bang Theory.