The Phantom Planet (1961)

This movie obviously isn't Oscar-worthy or one that will change your life. Heck, it's pretty cheap and silly as well. However, despite this, the movie is entertaining and despite many technical problems, it managed to keep my attention.

The film begins in the future...1980! There are moon bases and interplanetary travel is the norm. However, this travel is called into question when two ships crash into a planetoid that just appears directly in front of the ships with no warning! In other words, any space ship COULD just crash into this planet at any time and at any place...bummer. So, the best astronauts are sent to look for(?!) this hidden planetoid. Naturally, things don't go quite right and one of the astronauts is stranded on this place. Oddly, he is shrunk by the artificial atmosphere until he is itty-bitty just like the rest of the inhabitants. On this odd appearing and disappearing rocks, he has many adventures--a fight to the death, a sexy mute girlfriend and some silly looking bug-eyed aliens. While the sets and costumes are a bit silly, the film has so much action and plot devices that it does manage to entertain. You'll enjoy it provided you have an appreciation for this sort of sci-fi film.