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