Flash Gordon Conquers the Universe (1940) is a Science Fiction, Action film that follows a mysterious plague, the Purple Death, ravages the earth. Dr. Zarkov, investigating in his spaceship, finds a ship from planet Mongo seeding the atmosphere with dust. Sure enough, Ming the Merciless is up to his old tricks. So it's back to Mongo for Flash, Dale, and Zarkov. Currently, you can watch Flash Gordon Conquers the Universe on Amazon Video. Streaming availability may vary by country and platform over time. It has a user rating of 5.8 out of 10 from 23 votes. Fans of science fiction movies may also want to explore similar titles below.