Castle Dracula, and its infamous inhabitant Count Dracula, are known to people throughout the world whether or not they are familiar with Bram Stoker's 1897 novel. So powerful was Bram Stoker's portrayal of the ancient vampire legend that his has become the definitive version.

Dr. Jekyll is a caring doctor who experiments with drugs because he's certain that within each man lurk impulses for both good and evil. He soon discovers a drug to liberate the evil side within himself, becoming the hard drinking, woman-chasing Mr. Hyde. Jekyll quickly becomes addicted to the formula, unable to control the violent and unstable Mr. Hyde.