Failed TV show becomes a wildly uneven feature film about a space station and misdirected space shot becoming the first moonbase. Weird mix of comedy, drama and science fiction with more than a dash of (unnamed) anti-communist propaganda doesn't seem sure what it wants to be. Worse you don't know whether you're supposed to laugh at or with the film. The mere fact that this was an episode of Mystery Science Theater 3000 in its early days gives you an idea about how odd the film is. Its regrettably not very good and there's a good chance you'll end up turning the film off before the ending. Robert Heinlein was unhappy with the finished product because the TV show he worked on was changed against his wishes. Looking at the film and guessing what he actually had a hand in, I'm pretty sure that the evil "red" plot is his, I think that the film would still be quite silly- especially in retrospect. For bad film lovers or Heinlein completeists only.