Duel of the Space Monsters was released in the year 1965。Duel of the Space Monsters is also called as Frankenstein Meets the Spacemonster, Operation San Juan, Marte invade a Puerto Rico, Mars Invades Puerto Rico, Mars Attacks Puerto Rico, Frankenstein Meets the Space Men。

When an atomic war on Mars destroys the planet’s women, it’s up to Martian Princess Marcuzan and her right-hand man Dr. Nadir to travel to earth and kidnap women for new breeding stock. Landing in Puerto Rico, they shoot down a NASA space capsule manned by an android. With his electronic brain damaged, the android terrorizes the island while the Martians raid beaches and pool parties.