as Squadron Leader Charles Wyatt

as Dr. Paul Venner

as Dr. Lawrence 'Larry' Stevens

as Howard Joyce

as Inspector Thornton

as Carew

as Abbott

as McDowell

as Joe Garvey

as Philo Vance

as Hiram Rogers

as Sir William Clintock

as Sir Thomas Egerton

as Senor De La Torre

as Dr. Anton Rader

as Jim Ralston

as Major Henri de Beaujolais

as Colonel Tillman

as British Military Intelligence Agent

as Fingers

as Gerald Trask

as Dr. George Vanders

as Jim Cameron

as Dr. Mansfield

as Bill Stevens

as Col. Armand Lucien

as Stephen Gore

as Challon

as Major Thompson

as Prof. Landis

as Thomas Bradford

as Phillip Corey

as Tim Garnett

as Inspector Clarke

as Ben

as Sam Brooks

as Lewis