Victor McLaglen
— Dannie O'Neill
Walter Connolly
— Michael Steele
Peter Lorre
— Professor Sturm
June Lang
— Sheila O'Neill / Nancy Steele
Robert Kent
— Jimmie Wilson
Shirley Deane
— The false Nancy Steele
John Carradine
— Harry Wilkins
Jane Darwell
— Mrs. Mary Flaherty
Frank Conroy
— Dan Mallon
Granville Bates
— Flaherty
Everett Brown
— Billy Tarabull