The female lead of The Big Bang Theory was not always Penny, and early test reactions forced a major creative rethink that ...

Penny on 'The Big Bang Theory,' played by Kaley Cuoco, has both fans and critics, but viewers seem to all agree that the ...

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 ...

"The Big Bang Theory" featured many recurring habits that defined Sheldon Cooper (Jim Parsons), but few were as consistent as his practice of knocking on doors three times — most often when visiting ...