Hemliga agenter was released in the year 1943。Hemliga agenter is also called as Northern Pursuit, Punatakkien sankari, Ostaggio, Blutiger Schnee。

Canadian Mountie Steve Wagner captures a German Luftwaffe officer on a spy mission, who later escapes from the prison camp. To catch the spy ring, the Mounties employ a ruse so that the spies, believing Steve to be sympathetic, enlist him in their plans.