Chester Lauck
Lum Edwards
Norris Goff
Abner Peabody
Franklin Pangborn
Mr. Pinkney
Kay Linaker
Mrs. Madge Carmen
Irving Bacon
Omar Tennyson Gimpel
Herbert Rawlinson
J. J. Stark Sr.
Ivan F. Simpson
Professor Albert Frisby (as Ivan Simpson)
Rosemary La Planche
Miss LaPlanche, Dr. O'Brien's Nurse
Jack Carr
Airfield Attendant
