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.
John Hart
Jack Armstrong
Rosemary La Planche
Betty Fairfield
Claire James
Princess Alura [Chs. 3-6, 9-11, 15]
Joe Brown Jr.
Billy Fairfield (as Joe Brown)
Pierre Watkin
Uncle Jim Fairfield
Wheeler Oakman
Prof. Hobart Zorn
Jack Ingram
Henchman Blair
Eddie Parker
Henchman Slade
Hugh Prosser
Vic Hardy
Wallace Fox
Director
George H. Plympton
Story
Arthur Hoerl
Screenplay
Lewis Clay
Royal K. Cole
Leslie Swabacker
