Title : The Mad Ghoul
Genre : Science Fiction, Horror
Cast : George Zucco (Dr. Alfred Morris), David Bruce (Ted Allison), Evelyn Ankers (Isabel Lewis), Turhan Bey (Eric Iverson), Robert Armstrong ('Scoop' McClure), Milburn Stone (Sgt. Macklin), Rose Hobart (Della Elliott, reporter), Charles McGraw (Detective Garrity), Andrew Tombes (Mortician Eagan), Addison Richards (Editor Gavigan), Gus Glassmire (1st Cemetery Caretaker), Lillian Cornell (Isabel's Singing Voice (voice) (uncredited)), Gene O'Donnell (Radio Reporter (uncredited)), Chuck Hamilton (Policeman (uncredited)), Mike Lally (Reporter (uncredited)), Hans Herbert (Attendant (uncredited)), Isabel La Mal (Maid (uncredited)), Bess Flowers (Woman in Audience (uncredited)), Cyril Ring (Man in Audience (uncredited)), Bert Moorhouse (Man in Audience (uncredited)), Edmund Mortimer (Man in Audience (uncredited)), Lew Kelly (Stagehand (uncredited)), William Ruhl (Stagehand (uncredited))
Movie Plot : Dr. Alfred Morris, a university chemistry professor, rediscovers an ancient Mayan formula for a gas which turns men into pliant, obedient, zombie-like ghouls. After medical student Ted Allison becomes a guinea pig for Morris, the professor imagines that Allison's fiancée, a beautiful concert singer Isabel Lewis, wants to break off the engagement because she prefers the professor as a more "mature" lover but in reality loves Eric, her accompanist. In order to bring Ted back from his trance-like states, Morris commands him to perform a cardiectomy on recently deceased or living bodies in order to use serum from their hearts as a temporary antidote. When the serial murders seem to coincide with Isabel's touring schedule, ace reporter "Scoop" McClure gets on the mad scientist's trail.