"We did the very clichéd, in the beginning, goofy blonde who says foolish things," Lorre says of the character Penny.

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.

The Big Bang Theory may be defying the laws of TV mechanics with its storied success, but there’s one thing co-creator Chuck Lorre said the series “missed” early on with regard to Kaley Cuoco’s character Penny.