Detective Ellery Queen aids Free Dutch agents battle Nazi spies over a prize of industrial diamonds.
Directed byJames P. Hogan
Written byManfred Lee (story), Frederic Dannay (story), Eric Taylor (screenplay), Arthur Strawn (additional dialogue)
CountryUSA
Runtime64 min
On screen
William Gargan
Margaret Lindsay
Charley Grapewin
Gale Sondergaard