The space patrol sends Flash's best friend to investigate a planet where it is reported that mercy is a crime and the weak are exploited. The agent is captured, brainwashed and sent back to murder Flash. Thanks to Dale's timely intervention, Flash survives the attack, and the pair are sent back to the world to learn how Flash's friend was tricked into trying to assassinate his friend.

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