Kunal Nayyar recently revealed that he frequently could not keep a straight face as his character Raj Koothrappali while ...

Nayyar played the astrophysicist Rajesh "Raj" Koothrappali across the sitcom's full 12-season run on CBS. Kunal Nayyar's ...

The Big Bang Theory was at its best when referencing geek culture, especially during the special episode that celebrated Star ...

In The Big Bang Theory's tenth season, the episode "The Hot Tub Contamination" shows Sheldon telling Penny why he does this.