Have you ever heard of the Uncanny Valley? It’s the theory that explains why the human race tends to prefer humanoid robots, but only up to a point, after which we find them unsettling. It’s one reason why so many people found the 2019 film Cats bothersome to watch. The Uncanny Valley has also been present in film in recent years, especially when actors who have passed are recreated digitally to make an appearance, or when talent needs to look older or younger than they are.