Moon has the traits that originally drew me to sci-fi--imagination & psychological complexity. Much of what passes for science fiction in film is the equivalent of a futuristic western. Sam Rockwell is excellent as a lone human on the moon who meets a version of himself. Both must decide how they came to be where they are & what they are going to do next. This is not a movie with a long, nail-biting build-up to a huge confrontation. Instead, the story unfolds subtly with information gradually exposed , not told as background by characters striding through long hallways or overlooking cityscapes. I was pleased to see that Director Duncan Jones apparently inherited some of his father, David Bowie's, ability to tell a compelling story.