A murderer hopes to escape his death sentence by identifying the leaders of a spy ring.
Inspector Ralph Brown
Jill Wilson
Inspector Newcombe
Robert Isaac Pitt
Harold
Antonia Pitt
Pietr Revski
Wing Commander Riddle
Sir Robert Rosper
Professor Robinson-Heston
Karl Kopek
Prison Governor
Assistant Commissioner
Eric Colter
Young Woman
Pitt's Maid (uncredited)
Police Sergeant (uncredited)
Chertwell Security Guard (uncredited)
Nick (uncredited)
Waiter (uncredited)
