Firing Squad Penny shows no mercy in Kaley Cuoco's return to "Stuart Fails to Save the Universe." The third-to-last episode ...

The episode was from 'The Big Bang Theory' Season 4.

Actor Brian Thomas Smith, who played one of Penny’s ( Kaley Cuoco) love interests, Zack Johnson, in the hit CBS sitcom The ...

"The Big Bang Theory" features a quirky lineup of stars who aren't shy about sharing personal anecdotes and fun facts about the beloved sitcom.

Mayim Bialik tells Neil DeGrasse Tyson about transitioning from acting to neuroscience—then playing a scientist on The Big Bang Theory.

'The Big Bang Theory' spin-off was an unlikely idea that is getting a second season.

Sounds like The Big Bang Theory universe's next expansion is still light years away. Warner Bros. Discovery confirmed on April 12 that executive producer Chuck Lorre was developing a new comedy series ...

The actor starred in the hit CBS sitcom throughout its 12-season run.