The Mad Ghoul
A university chemistry professor experiments with an ancient Mayan gas on a medical student, turning the would-be surgeon into a murdering ghoul as part of a plan to steal his lover.
- genus: Science Fiction, Horror
- Studio: Universal Pictures
- keyword: mad scientist, singer, laboratory, serial killer, mad doctor, zombie, scientist, monkey, medical student, scientific experiment
- cast: George Zucco, David Bruce, Evelyn Ankers, Turhan Bey, Robert Armstrong, Milburn Stone