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