As consumers of stories, people have always been fascinated by doppelgängers. Think The Strange Case of Dr. Jekyll and Mr. Hyde or the motif of the “evil twin.”

One of the highest-grossing movies of 2019, Us, tells the eerie tale of a family and its ghoulish counterpart. Director Jordan Peele said the film was inspired in part by an episode of the Twilight Zone in which a woman comes face-to-face with a darker version of herself.