"The Big Bang Theory" had some excellent guest stars over the years, and thanks to the main characters' pop culture interests ...

Although The Big Bang Theory’s twist ending wasn’t justified, the most unexpected revelation in the series finale could have ...

The Big Bang Theory family tree is growing even bigger! During Wednesday's PaleyFest panel in Los Angeles, it was announced that Taxi star Judd Hirsch has been tapped to play Leonard's dad for an ...

Leonard and Penny 2.0 officially kick off Thursday when CBS’ The Big Bang Theory picks up on the heels of its risky 100th episode that saw the pair reunite — but is the couple made for each other?

'The Big Bang Theory' fans may know Sheldon Cooper's IQ, but did you know the writers revealed Leonard's IQ in the pilot episode?

'The Big Bang Theory' had one key relationship, Sheldon Cooper and Leonard Hofstadter as roommates. Why did Leonard put up with the fussy physicist? The answer is all psychological.

How much do you know about The Big Bang Theory's Leonard Hofstadter? This quiz contains 12 quotes from the show and all you need to do is work out if they were said by Leonard or someone else.

The season 9 premiere of "The Big Bang Theory" is a "big" one. It opens in Vegas with Leonard and Penny getting married, played by longtime "Big Bang" stars Johnny Galec ...

The Big Bang Theory is getting a very special guest. The show announced on its Twitter and Facebook accounts this week that Leonard Nimoy's son, Adam, will appear on the show's Nov. 5 episode ...

The Big Bang Theory is gearing up for a big Season 9 premiere episode. Showrunner Steve Molaro has already revealed that Penny and Leonard will finally take the plunge and tie the knot during the ...

Are ‘The Big Bang Theory’s’ Leonard and Penny Getting Engaged? Co-star Johnny Galecki tells THR that the upcoming Valentine's Day episode will be a big one for the couple.