The 1920 silent version of Dr. Jekyll and Mr. Hyde begins with a dire declaration: "In each of us, two nature's are at war -- the good and the evil. All our lives the fight goes on between them, and one of them must conquer." You can get all of the rest of this classic on YouTube. It's chopped up into nine segments, but the interruptions are quibbling points when you consider that this adaptation of Robert Louis Stevenson's short novel is probably the best.  The movie, which stars John Barrymore, was shot at New York's then brand-new Astoria Long Island Studios. Fun fact: Barrymore help out with the set design by hauling many of his potted plants to the set from his Manhattan apartment.