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