Gene O'Donnell

A mad scientist develops an aftershave lotion that causes his gigantic bats to kill anyone who wears it.

Dr. Bernard Adrian is a kindly mad scientist who seeks to cure a young woman's polio. He needs spinal fluid from a human to complete the formula for his experimental serum.

A party girl is murdered, and everyone at a Utah motel is a suspect.

A university chemistry professor experiments with an ancient Mayan gas on a medical student, turning the would-be surgeon into a murdering ghoul.