Black Dragons (1942)

A cabal of American industrialists, all fifth-columnists intent on sabotaging the war effort, are methodically murdered by Monsieur Colomb. (Bela Lugosi) Detective Dick Martin (Clayton Moore) is assigned to uncover this his fiendish plot. (Clayton Moore is most famous for playing The Lone Ranger!)

This was rushed into production immediately following the attack on Pearl Harbor by Japanese sources, making it one of the first movies to respond to the attack and the United States new enemies.