Jack Armstrong
Plot: 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. John Hart was 29 in Jack Armstrong as 'Jack Armstrong'.
Rosemary La Planche. Rosemary La Planche was 23 in Jack Armstrong as 'Betty Fairfield'.
Claire James. Claire James was 26 in Jack Armstrong as 'Princess Alura [Chs. 3-6, 9-11, 15]'.
Joe Brown Jr.. Joe Brown Jr. was 25 in Jack Armstrong as 'Billy Fairfield (as Joe Brown)'.
Pierre Watkin. Pierre Watkin was 57 in Jack Armstrong as 'Uncle Jim Fairfield'.
Wheeler Oakman. Wheeler Oakman was 56 in Jack Armstrong as 'Prof. Hobart Zorn'.
Jack Ingram. Jack Ingram was 44 in Jack Armstrong as 'Henchman Blair'.
Eddie Parker. Eddie Parker was 46 in Jack Armstrong as 'Henchman Slade'.
Hugh Prosser. Hugh Prosser was 46 in Jack Armstrong as 'Vic Hardy'.
Wallace Fox. Wallace Fox was 51 in Jack Armstrong as 'Director'
Arthur Hoerl. Arthur Hoerl was 55 in Jack Armstrong as 'Screenplay'
Royal K. Cole. Royal K. Cole was 39 in Jack Armstrong as 'Screenplay'
Leslie Swabacker. Leslie Swabacker was >> in Jack Armstrong as 'Screenplay'
George H. Plympton. George H. Plympton was 57 in Jack Armstrong as 'Story'