Hidden Enemy The "Inside Story" Of The Story That Was TOO HOT To Print! Reporter vs. German spies and their new metal. Details Casts Galleries Posters Title Hidden Enemy Release Date 1940-01-20 Runtime 01 Hours 03 Minutes Genres Action Adventure Drama Production Companies Monogram Pictures Production Countries United States of America Warren Hull... Bill MacGregor... Kay Linaker... Sonia Manning... Wilhelm von Brincken... Professor Werner... George Cleveland... John MacGregor... Fern Emmett... Aunt Mary... Edward Keane... Newspaper Editor... Willy Castello... Eric Bowman... John Sheehan... Marden... Herbert Corthell... Pete... Vince Rush... Gruen... Original Size (1814x1020) Original Size (899x1347) Original Size (550x791)