Diễn viên
C. Montague Shaw
Franklin Prescott (uncredited)
Michael Whalen
Robert Norton
Anne Nagel
Nancy Fielding
Constance Worth
Linda Pavlo
Jack Mulhall
Chief Agent James Curtis
George Pembroke
Prof. Karl Schmidt
Robert Frazer
John Oliver
Willy Castello
Otto
Poppy Wilde
Restaurant Patron (uncredited)
William Bakewell
Tom Fielding
Hans Heinrich von Twardowski
Capt. Gemmler
Kenneth Harlan
Agent Brown
Michael Vallon
Argus