Overview
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.
Cast
Buster Crabbe
Carol Hughes
Charles Middleton
Anne Gwynne
Frank Shannon
John Hamilton
Herbert Rawlinson
Tom Chatterton
