Prior to Kaley Cuoco, actress Amanda Walsh was cast to play Katie, “a street-hardened tough-as-nails woman with a vulnerable interior.”

Lorre explained that it took the show a while to understand that the character was more than a "dumb blonde"The Big Bang Theory creator Chuck Lorre is looking back on the evolution of Kaley Cuoco’s character in the beloved sitcom’s early days.

I t’s been over 17 years since The Big Bang Theory premiered, and almost six years since it ended, but the CBS sitcom remains one of the best shows streaming on Max, and its uni