Flash Gordon (forever personified by Buster Crabbe), Dr. Zarkov and Dale Arden return in the third and final adventure of this immortal science fiction series. Flash must voyage to the planet Mongo, searching for the origin of The Purple Death, a fatal disease that has been wreaking havoc on Earth. Emperor Ming the Merciless is the culprit who, with his villainous army, strikes at Flash with death-dealing futuristic weaponry including atomic ray guns, guided missiles and horrifying explosive mechanical men. Flash Gordon's action and special effects were considered quite remarkable for the time and set the standard for serials to come.

This classic movie serial stars Buster Crabbe as Flash Gordon. In the first volume, our hero discovers that the Emperor Ming of the planet Mongo is dusting the Earth with a poisonous mist called "The Purple Death." Flash must go to Mongo, discover an antidote and destroy Ming. Included here are episodes one through four: "The Purple Death," "Freezing Torture," "Walking Bombs," and "The Destroying Ray."

In the second volume, containing four more episodes, Flash joins forces with Dale Arden and Dr. Hans Zarkoff to do battle the evil Ming the Merciless: "The Palace Of Terror," "Flaming Death," "The Land Of The Death," and "The Fiery Abyss."