Released in the early years of WWII, this WWI espionage thriller is told from the perspective of the German naval officer who is smuggled onto a remote Scottish island to sabotage the fleet of British naval ships docked nearby. Surprisingly, it's only following a neat twist in the final act that director Michael Powell depicts the spy, who is portrayed with silky charm by Conrad Veidt, as the stereotypical evil Nazi that would flood cinema screens for generations to come.