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