“Who knows what evil lurks in the hearts of men? The Shadow knows.”
Perhaps one of the most iconic detectives of the 1930’s was a fella named Lamont Cranston (or Kent Allard, depending on the scenario) who used “mysterious powers to cloud men’s minds” so he was virtually invisible. The thought that an unseen presence is watching you and ready to catch you when you misbehave is both eerie and cool. I’m not sure why the Shadow fell out of popularity after the 40’s, but if you ever want to hear a chilling and exciting tale, go download one of the old radio shows (they’re free!).