Sheldon Cooper has many quirks on The Big Bang Theory, including knocking thrice on somebody's door. Here's the reason why he ...

As Penny Hofstadter and Sheldon Cooper on "The Big Bang Theory," Jim Parsons and Kaley Cuoco share plenty of moments that range from uncomfortable to flat-out sweet — but in real life, they've also ...

To underscore those rare instances when he succumbs to his humorous side, Sheldon will punctuate his jokes and pranks with the triumphant exclamation “Bazinga!” after (sometimes long after) his jokes ...

The Big Bang Theory is, at its heart, about relationships. The geek culture references, cameos, and science speak are dressings, and funny ones at that. But from the very beginning, the series set ...

"We did the very clichéd, in the beginning, goofy blonde who says foolish things," Lorre says of the character Penny. By Carly Thomas Associate Editor Lorre, alongside Warner Bros. Television Group ...

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.