Robinson Crusoe of Clipper Island

Ray Mala as Mala, operative of the United States Intelligence Department undercover as a Pacific Dirigible Airlines radio operator , Rex the Wonder Horse, Buck the Dog, Tiny Roebuck as Eppa - the Wrestler, Mamo Clark as Princess Melani, princess and ruler of the Komatoans, Herbert Rawlinson as Grant Jackson, William Newell as Hank McGlaurie, John Ward as Anthony Tupper, John Dilson as E. G. Ellsworth, Selmer Jackson as Canfield