Bert is Evil!
The Good, the Bert and the Ernie
Even before Bert en Ernie made their first appearance on Sesame Street they had a big shot of becoming the new big thing on the silver screen.
If it wasn't for Sergio Leone who found out that there's a darker side to Bert. He decided that, even though the movie was finished, the parts played by Ernie and Bert should be re-played by other actors. This brought on the upcoming star; Clint Eastwood.