It's hard to imagine Johnny Galecki playing anyone but Leonard Hofstadter in "The Big Bang Theory," but the co-creators ...

The cast of "The Big Bang Theory" earned universal fame and acclaim for their celebrated sitcom ... but they also experienced ...

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 ...

When Leonard makes the same joke about the doc, Penny is not amused. “I already pretended to laugh at that joke once, do I have to do it again?” she bemoans, but eventually caters to Leonard’s wishes.

The Big Bang Theory Season 6, Episode 20, “The Tenure Turbulence,” pits Sheldon, Raj, and Leonard against each other as they all go after a tenure position that opens up at their workplace, Caltech.