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 ...

"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 ...

For anyone who ever felt different growing up-too quiet, too literal, too sensitive for the world around them-Sheldon Cooper's story has always resonated on a deeply personal level. Long before he ...

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 prequel Young Sheldon mostly avoided defining its timeline, but sci-fi author Isaac Asimov put a major event on the board.

‘The Young Sheldon’ follows high-functioning autistic genius Sheldon Cooper’s childhood - a character fans knew first in ‘The Big Bang Theory.’ ...