I remember seeing these Flash Gordon movies when I was a kid, and was enthralled by the serials (as they were presented). Each week, the show would end with Flash, Dr. Zarkof or Dale Arden in an inescapable death situation.... the next week, we'd see how they escaped. The heros travel to Mars or Mongo to save the earth from the most wicked villan in the universe, Ming the Merciless, played by Charles Middelton. Middelton was superb as Ming.... pure evil. The special effects in the movie are outdated and laughable by today's standards, but were very impressive when they were created. You certainly won't see Star Wars or Return of the Jedi here, but if you want to go back to a much earlier vintage space movie, or if you remember these from your youth, they'll be of value to you.