The Big Bang Theory Ended Without Solving One Huge Mystery

Comicbook.com recently wrote, "We're still fresh off of the ending of The Big Bang Theory, and many fans are now missing the comedic exploits of Leonard, Sheldon, Penny, Amy, and the rest of the gang." And although the show provided much needed closure to it's fans, there is one incident they didn't resolve: Penny's last name. Throughout the entire show fans were never told what it was and now they are left wondering.