Harold Huth

as Hugh Sainsbury

as Count Raul De La Vague

as Dr. Zhiga

as Aga Ben Dragore

as George Grant

as Mark McGill

as Karl Van der Hyde

as Walter Creason

as John Durham

as Anton Ragatzy

as Maurice Dupont

as Tony Carleton

as Arezzi

as Capt. Nolan, Adjutant