Invasion of the Neptune Men is Japan's answer to the success of Forbidden Planet, or so it seems anyway. Not only do the aliens look like Robby the Robot, but the kids in the movie actually play with a toy of Robby the Robot. Yeah, it's that blatant. It's also another attempt at a Prince of Space-type movie. I'm sure these movies were successful at the time and children ate them up, especially when you consider that the children in the movie play a major role. You might even say there is far too much of them, and the horrible shrill overdubbing doesn't help. The film was featured on an episode of Mystery Science Theater 3000, which is about the only thing people remember about it. It also pops up in these big 50 Movie Sci-Fi DVD sets every so often, which should tell you everything you need to know about the quality of it. It's just not a great movie and it doesn't hold up at all.