Overview
The Mad Ghoul is a 1943 American horror film directed by James Hogan and starring Turhan Bey, Evelyn Ankers, and David Bruce, and featuring George Zucco, Robert Armstrong, and Milburn Stone. The film is about the scientist Dr. Alfred Morris and his assistant Ted Allison. Morris, who is obsessed with an ancient Mayan life-preserving process to the point of madness, has fallen in love with Allison's girlfriend, the concert singer Isabel Lewis. Morris decides to use Allison for his eternal-life experiments, transforming him into a zombie who slowly recalls his past life, but is unaware of his undead status.
The Mad Ghoul was developed at Universal Pictures in February 1943 under the title The Mystery of the Mad Ghoul. Filming was completed in May for a release on November 12 the same year.
Plot
Dr. Alfred Morris (Zucco) is curious about the effects of an ancient nerve gas, used by the Mayans during rituals of human dissection to appease their gods. He takes medical student Ted Allison (David Bruce) under his wing to assist him with his experiments in using the gas on modern animals. Despite Ted's enthusiasm for the success of their effort to revive Morris's dead monkey Choco (who was earlier exposed to the gas and died) by using a fluid from the heart of another creature, Ted also has on his mind his girlfriend Isabel Lewis (Evelyn Ankers), of whom Morris has also become enamored.
Later, on the night of the duo's first experiment, Ted brings Isabel to Morris's house, where Morris notices Isabel's discomfort about her relationship with Ted. He confers with Isabel, saying that she does indeed need a man more involved with her love of music, secretly meaning himself. Isabel, however, is afraid of hurting Ted's feelings and getting him to understand what she wants, but Morris promises to take care of the situation himself. Unbeknownst to Isabel, Morris's evil plan involves destroying Ted by exposing him to the lethal Mayan gas the next day, and in effect, making him a mindless ghoul who, like Choco, must continually rely on the fluid of human hearts to survive (obtained by performing cardioectomies on freshly dead persons). This sets Ted and Morris on a grave-robbing spree through several towns where Isabel is also performing on her tour. Morris tries to get Ted to return home, but Ted is committed to being with Isabel whenever possible, whenever he is not in his unknowing ghoulish state.
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