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