Dale is sent to a prison world to repair the machinery used to create oxygen, without which not only the ruthless prisoners, but the warden and his guards would soon perish. Flaggert, the most notorious murderer in the galaxy manages to break out of his cell and hides on Flash Gordon's spaceship in order to make good his escape and have his revenge on the man who sent him to prison in the first place.

Directed by Gunther von Fritsch
Starring Steve Holland, Irene Champlin, Joseph Nash

Cast
Steve Holland as Flash Gordon
Irene Champlin as Dale Arden
Joseph Nash as Dr. Hans Zarkov
Henry Beckman as Cmdr. Paul Richards