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.
Jack Armstrong
Betty Fairfield
Princess Alura [Chs. 3-6, 9-11, 15]
Billy Fairfield (as Joe Brown)
Uncle Jim Fairfield
Prof. Hobart Zorn
Henchman Blair
Henchman Slade
Vic Hardy
