The Terminator is considered to be one of the greatest sci-fi films of all time. Its tremendous launch the career of director James Cameron and spawned a franchise of films, including a legendary sequel that's actually better than the original. Arnold Schwarzenegger's monotone killing machine, sporting a black leather jacket and black shades, has become one of the most iconic characters in movie history. It's impossible now to imagine anyone else playing the T-800, though it almost came close to happening.