Doctor X
Reporter Lee Taylor (Lee Tracy) is investigating a series of pathological murders that have taken place over a series of months in New York City. The murders always take place at night, under the light of a full moon (the newspapers dubbing them the "Moon Killer Murders"). Furthermore, each body has been cannibalized after the murder has taken place. Witnesses to the events describe a horribly disfigured "monster" as the killer.
Doctor Xavier (Lionel Atwill) is called in for his medical opinion, but it is learned through meeting with the police that the ulterior motive behind this is to begin an investigation of Xavier's medical academy, as the scalpel used to cannibalize the bodies of the victims was exclusive to that institution. Aside from Xavier, the other suspects are: Wells (Preston Foster), an amputee who has made a study of cannibalism; Haines (John Wray), who displays a sexual perversion with voyeurism; Duke (Harry Beresford), a grouchy loudmouth cripple; and Rowitz (Arthur Edmund Carewe), who is conducting studies of the psychological effects of the moon (Rowitz also displays a notable scar on one side of his face). It is learned that Haines and Rowitz were stranded in a boat with another man, and that while they claimed he had died and they had thrown him overboard, it was suspected that they had, in fact, cannibalized him.
The police give Xavier 48 hours to apprehend the killer in his own way. During this time, Taylor investigates the doctor's intentions and in the process, meets Joan Xavier (Fay Wray), the doctor's daughter. Joan is exceedingly cold to Taylor, particularly after finding out that it was his story that pointed a finger at her father and ruined his first attempt at locating the killer. Taylor, however, manages to find a romantic interest in Joan before being escorted out. He is then walking out of the house as the maid dumps ice water on him.
The setting switches to Xavier's beach-side estate on Long Island. There, all of the suspects are brought in for an unorthodox examination of their guilt: each member (excluding Wells, because it is known that the killer has two hands and he has but one) is connected to an electrical system that records their heart rate. When a re-enactment of the murder of a cleaning woman appears before them, the detector will expose the guilty man who will have no choice but to confess. Dr. Xavier's butler and maid, Otto (George Rosener) and Mamie (Leila Bennett), carry out the reenactment.
Things go awry, however, when a number of events inhibit the experiment. First, Taylor breaks into the home and hides in a storage closet, but is rendered unconscious by gas that the killer puts in the room. During the experiment, a blackout occurs. Wells, in another room controlling the equipment, appears to fall through a glass door. When power is regained, it is discovered that Rowitz, whose monitor supposedly revealed him as the guilty party just before the blackout, has been murdered, a victim of a scalpel to the base of the brain.
Taylor is discovered by the staff and Xavier has no choice but to keep him there until the investigation is over, lest he report back to his paper. Joan decides to be friendly to Taylor, as she sees that he is the only one with enough intuition to solve the crime. Later that night, it is discovered that during these hours, Rowitz's body has been cannibalized.
The following evening, the police allow Xavier an extension till midnight to apprehend the killer. Xavier again asks Otto and Mamie to re-enact another of the murders. Mamie is too frightened and ill to play her part, so Joan takes Mamie's place. All of the men, save for Wells, are this time handcuffed to their seats. It is during this that we find out that it is, in fact, Wells who is the killer. As his "guests" are all handcuffed and helpless, he is free to explain. Through a "synthetic flesh" composition that he himself has created, Wells has been creating artificial limbs and a horrific mask to carry out his crimes in order to collect living samples of human flesh for his experiments. It turns out at first for years he had been searching for a secret manufactured flesh and eventually finds it; so, he went to Africa one time, not to study cannibalism, but to get samples of the human flesh the natives eat. To collect his final victim, Wells sneaks up on Otto and strangles him. Then, he proceeds to reveal himself and his intentions for collecting Joan as his specimen in front of everyone.
Just as Wells is about to strangle Joan, Taylor — posing as one of a series of wax figures representing the killer's victims — jumps Wells and the two men get into a scuffle. As Wells lunges towards Taylor, Taylor grabs a kerosene lamp and hurls it at Wells. Set on fire, Wells stumbles and crashes out a window and falls down a cliff into the ocean. Reporting his story into the paper, Taylor tells his editor to make space in the marriage section for Joan and himself.
murder, atmospheric