For years, people have been trying to warn us about the secret demonic nature of perpetually chipper Spongebob Squarepants. No one could be that happy all the time. Unless they were hiding something.

A century ago, Nosferatu’s vile villain Count Orlok became an icon when he walked through a doorway, eyes frenzied and claws menacing, to drain his victim’s blood. But just 20 years ago, the same ...