Overview
Detective Ellery Queen aids Free Dutch agents battle Nazi spies over a prize of industrial diamonds.
Cast
- William Gargan as Ellery Queen
- Margaret Lindsay as Nikki Porter
- Charley Grapewin as Inspector Richard Queen
- Gale Sondergaard as Mrs. Van Dorn
- Gilbert Roland as Paul Gilette
- Sig Ruman as Heinrich, Spy Leader
- James Burke as Police Sergeant Velie