"The Big Bang Theory" co-creator Chuck Lorre says Kaley Cuoco's character Penny took a few seasons to fully understand. "It's a cliched character: the dumb blonde, and we missed it," Lorre said during the first episode of "The Official Big Bang Theory Podcast.

The Big Bang Theory creator Chuck Lore reflected on Kaley Cuoco’s character Penny’s evolution throughout the 12 season series and her character arch in the early episodes.Lorre

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.