Some film examples:

Star Wars. Senator/Chancellor/Emperor Palpatine is secretly Darth Sidious. Darth Vader used to be/is Anakin Skywalker.

A Kid in King Arthur's Court. The Black Knight is a master jouster who gives to the people. He's also a princess.


"Oh, you can’t help that," said the Cat: "we’re all mad here. I’m mad. You’re mad."
"How do you know I’m mad?" said Alice.
"You must be," said the Cat, "or you wouldn’t have come here.”

- Lewis Carroll, Alice in Wonderland