15 episode serial where Jack Armstrong, the All-American Boy, battles the evil Dr. Grood, who has placed a death ray aboard his spaceship orbiting Earth.
Practical Effects
Spaceship sets that wobble charmingly on visible wires.
Costume
Dr. Grood's villain aesthetic: committed, unhinged, magnificent.

Director
Wallace Fox
Trivia, insights & behind the scenes
Jack Armstrong originated as a radio serial in 1933, making this film a rare case of a multimedia franchise before that term existed.
John Hart later replaced Clayton Moore as the Lone Ranger for 52 episodes when Moore had a contract dispute.