Its initial inspiration, appropriately enough, was the old Twilight Zone episode “Mirror Image,” which he saw as a kid. In it, a woman encounters her duplicate in a bus station and becomes convinced it arrived from a parallel universe, bent on replacing her. “It’s terrifying, beautiful, really elegant storytelling,” Peele says, “and it opens up a world. It opens up your imagination.” He spent six months breaking down his script in his head and another six writing — a substantially shorter gestation period than Get Out.