2001: A Space Odyssey. When you have a great science fiction author like Arthur C. Clarke combined with a great director like Kubrick, and the author is allowed to work closely with the director, and the director is given the freedom to do as he wishes, and he wishes to remain true to the original author's wishes, you end up with a classic sci-fi film. I don't think I actually got around to watching it until my college years, and because I was studying Physics at the time, one thing really jumped out at me. With the exception of certain mystical elements, the film was amazingly faithful to the actual laws of physics. Thus, the title of this entry.