Oh sure, we know that archetypal characters get used over and over in stories. Anyone can see that Merlin, Dumbledore, Gandalf, and Obi-Wan all serve the same role in moving the plot along. Every sitcom family has a wacky neighbor, like Urkel, Wilson, Kramer, and Barney Fife. But sometimes the characters are much more alike than that.
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However, some pairs of characters have traits and backstories that are from either the writer’s possibly unconscious influence on each other -or else from The Twilight Zone.
You might be surprised at how characters from movies and TV line up with each other, even when they are from very different types of stories. Ywo of the characters were even played by the same actor. See all 20 Pictofacts at Cracked.