It's a tough world out there, and if science fiction is any guide, it's only going to get more dystopian and hairstyle-challenged in the years to come. You're going to need some protection from all those tinfoil-clad harpoon-punks who want to steal your teeth. Ideally, it should be someone dependable, as well as a person you'd like to spend all your time with. Someone like one of the great bad-asses of science fiction. Which sci-fi bruiser would you want to have as your personal bodyguard?