Lieutenant Hirth Raymond Lovell as Lieutenant Kuhnecke Niall MacGinnis as Vogel Peter Moore as Kranz John Chandos as Lohrmann Basil Appleby as Jahner The Canadians Laurence Olivier as Johnnie, the trapper Finlay Currie as the factor Ley On as Nick, the Eskimo Anton Walbrook as Peter Glynis Johns as Anna Charles Victor as Andreas Frederick Piper as David Leslie Howard as Philip Armstrong Scott Tawera Moana as George, the Indian Eric Clavering as Art Charles Rolfe as Bob Raymond Massey as Andy Brock Theodore Salt and O.W. Fonger as the United States Customs officers Production The opening credits and dedication appear over an aerial panorama of the Canadian Rockies. The opening shot reads:This film is dedicated to Canada and to Canadians all over the Dominion who helped us to make it; to the Governments of the USA, of the Dominion of Canada, and of the United Kingdom, who made it possible, and to the actors who believed in our story and came from all parts of the world to play in it.Powell's interest in making a propaganda film set in Canada to aid the British war effort dovetailed with some of Pressburger's work. Although only a concept during pre-production, a screenplay began to be formulated based on Pressburger's idea to replicate the Ten Little Indians scenario of people being removed from a group, one by one. While Powell and Pressburger developed the screenplay, additional photography was assembled of the scope and breadth of Canada. All the opening "travelogue" footage was shot by Freddie Young with a hand-held camera out the windows of various aircraft, trains and automobiles on an initial trip across Canada. The U-boat was built by Harry Roper of Halifax, Nova Scotia and towed to Corner Brook, Newfoundland, where it was "shot down" by the Royal Canadian Air Force (RCAF) Lockheed Hudson bombers in the Strait of Belle Isle at the beginning of the film. Powell forgot that Newfoundland was at the time a Crown Colony, not a part of Canada. As a result, when they moved the full-sized submarine model there, it was impounded by Customs & Excise, which demanded that import duty be paid. Powell had to appeal to the Governor of Newfoundland, citing the film's contribution to the war effort. The "U-37" carried two 1,000 lb bombs supplied by the RCAF. Powell did not tell the actors that they were aboard, as he thought that