"The Simpsons" has changed a LOT over its 25 seasons. While it has adapted and updated itself over the course of its more-than 500 episodes, certain elements remain mysterious.
Cinefix is enlightening "Simpsons" fans to some of the show's little-known secrets and fun facts about its evolution. Do you know what Otto's full name was supposed to be? Or which celebrity "The Simpsons" can't manage to book? Find out the answers to these questions and more in the video above.