As Leonard, Johnny Galecki helped anchor The Big Bang Theory for 12 seasons, but one of the show's recurring actors also tried out for the iconic role.

Although The Big Bang Theory’s worst mistake came relatively late in the popular sitcom’s 12-season run, the series still never recovered from this easily avoidable blunder. By The Big Bang Theory’s ...

Add Yahoo as a preferred source to see more of our stories on Google. Johnny Galecki's Leonard Hofstadter wearing a hoodie and yellow shirt on The Big Bang Theory - CBS We may receive a commission on ...

After 19 years, Chuck Lorre is veering away from its winning formula approach to characters for The Big Bang Theory's sequel ...