necessary. While the other patients sleep, Natalie is sedated, taken to the operating room, and given an artificial gland along with a high dosage of electricity. The procedure backfires, and she ends up a senile old woman. They hide her in a back room. Lobo is ordered to bury Jedrow alive, but Frank Scott sneaks out to the burial site and opens the coffin. Jedrow rises out of it and escapes, and Lobo - not having been alerted - buries the casket. Sharon confronts Conway about his apparent affinity for Grace, and requests that she be made the next patient to be experimented upon. Meanwhile, Scott begins attempting to reveal to the other patients that Dr. Conway is carrying out horrific deeds to their friends. After a failed attempt to reveal Natalie's fate, he manages to show Grace and Danny what had happened to her, only to get caught by Dr. Conway and Sharon. They detain Scott and Danny and prepare Grace for surgery. Danny helps Scott escape by distracting Lobo, who fatally shoots him before being knocked unconscious. Scott confronts Dr. Conway with Lobo's gun and reveals that he is not a convicted murderer; he is actually Lt. Mark Houston, an undercover police officer sent to the psychiatrist's business to investigate it. Dr. Conway evades arrest, but is murdered by Jedrow. Lobo comes in and kills Jedrow, but Chambers' police backup arrive soon afterward and arrest Lobo and Sharon, barely saving Grace from the procedure. The police go downstairs and find Danny's body, and then discover a menagerie of beastly men, all failed subjects of Conway's longevity experiments. The police captain wonders, "Good Lord - what if they DO live forever?" Cast John Carradine as Dr. Charles Conway Myron Healey (misspelled Myron Healy) as Mark Houston, alias Frank Scott Allison Hayes as Grace Thomas Marilyn Buferd (misspelled Marylyn Buferd) as Dr. Sharon Gilchrist Arthur Batanides as Danny Green Sally Todd as Natalie Andries Tor Johnson as Lobo Harry Fleer as Harry Jedrow Roy Gordon as Dr. Loren Wright Guy Prescott as Police Captain George Reagan Raymond Guth (misspelled Raymond Guta) as Police Officer Miller Paul McWillimas as Police Officer Ed Production Along with Anatomy of a Psycho (1961), The Unearthly was one of two films produced and directed by Boris Petroff as "Brook L. Peters." Originally called The House of Monsters, it was filmed over approximately five days. The