One of the most compelling things about Stanley Kubrick’s sci-fi masterpiece 2001: A Space Odyssey, is the way we don’t get to identify the baddie until halfway through. And even then we don’t get to see the baddie’s face, of course, because he doesn’t have one. And while HAL, the Heuristic Algorithm computer which maintains the spaceship’s vital functions, does eventually evince something like emotion, it’s not until after he’s killed three astronauts who questioned his performance and realised a fourth one has gotten the better of him.