Weirdo re-edit of the 1965 film "Voyage to the Prehistoric Planet," which itself was a re-edit of a 1962 Soviet era science fiction film that had been dubbed into English, but this 1968 re-edit was done for Roger Corman by a young Peter Bogdanovich ("The Last Picture Show" "Paper Moon"), though billed as Derek Thomas, who added new footage of Mamie Van Doren. The story takes place in the distant future of 1998, where a group of astronauts land on Venus to kill a pterodactyl-like creature that's worshiped by the planet's seductive women, led by VanDoren. The pterodactyl was in the original version, but Bogdanovich added the women, but unfortunately to little effect. The film does have novelty value in it being one of producer Corman's sillier than most cash grabs, taking a film he already owned and adding sex to sell the movie again, along with it being an early work by Bogdanovich, but outside of that there's really not a lot to suggest here. FUN FACT: Bogdanovich provided the film with its Orson Welles-like narration.