John Wengraf

as Hans Eckhart

as Dr. Morell

as Dr. Kessler

as Dr. Erich Heinrich

as John Merriman

as Mr. Louis Horvat

as Sermaine

as Prof. Zimmelman

as Dr. Zeitman

as Commodore Renard

as Col. Schuman (uncredited)

as Count Franz Von Papen

as 'Shiv' Triano

as Joseph - Gray & Isabel's Butler

as Dr. Ludwig

as Maj. von Falken