Northern Pursuit

Northern Pursuit is a 1943 World War II film directed by Raoul Walsh and starring Errol Flynn as a member of the Royal Canadian Mounted Police who tries to uncover a Nazi plot against the Allied war effort. The film was set in Canada during the early years of the war.

Wagner and his new confederate set out for the north by train, while a pursuing Mountie who makes contact with Wagner is killed by the agent. Wagner is taken to von Keller and convinces him that he is loyal to Germany and can guide him and his companions through the Canadian wilderness to a mysterious destination. His fiancee Laura McBain Julie Bishop is held as a hostage to ensure his loyalty but Wagner, acting as a double agent, manages to send a message to headquarters to alert them of the Nazi saboteurs plans.Fellow Mountie, Jim Austin John Ridgely follows their trail, but is spotted and killed, along with Willis and an Indian porter, before the group reaches a mine shaft where bomber components have been secreted before the war. The bomber is assembled and takes off for its mission to bomb the main arterial waterway between the United States and Canada to disrupt transatlantic shipping of war materials. Wagner manages to escape, climb aboard the aircraft to shoot the crew, and parachute to safety before the bomber crashes. After recovering from a wound he received during the skirmish on board the aircraft, he and Laura marry. ........

Source: Wikipedia