Allan Lane
— Steve Kendall
Robert Barrat
— Tio / Edwards
Lionel Royce
— Second Lieutenant
J. Farrell MacDonald
— Captain of the Falcon
Charley Foy
— Studs
Linda Hayes
— Nedra Carlson
Lester Matthews
— Gair - Henchman
Henry Brandon
— Carlson - Crewman
Wilhelm von Brincken
— Second-Mate Wilso
Solly Ward
— Dr. Fromm