Overview
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.
Cast
- John Hart as Jack Armstrong
- Rosemary La Planche as Betty Fairfield
- Claire James as Princess Alura [Chs. 3-6, 9-11, 15]
- Joe Brown Jr. as Billy Fairfield (as Joe Brown)
- Pierre Watkin as Uncle Jim Fairfield
- Wheeler Oakman as Prof. Hobart Zorn
- Jack Ingram as Henchman Blair
- Eddie Parker as Henchman Slade
- Hugh Prosser as Vic Hardy