Any one see this film?Astronauts go to Mars and on return are swept into the future a post war Earth.They find this out after they land.The good people live under ground-the men are mostly elderly and women are young.The mutants live in above ground caves.Good wins out.Effects are cheap but the story IMO is OK.Rod Taylor of Time Machine fame plays a role.Film is from 1958 and not on video or dvd yet.