Best movies like Dr. Renault's Secret

A misguided scientist enables an alien from Venus named Zontar to come to earth in order to "help solve man's problems". However, as soon as Zontar arrives on Earth, it quickly becomes obvious that the three-eyed, bat-winged, skeletal black creature has a hidden agenda.

When the villagers of Kleinschloss start dying of blood loss, the town fathers suspect a resurgence of vampirism. While police inspector Karl Brettschneider remains skeptical, scientist Dr. Otto von Niemann cares for the vampire's victims one by one, and suspicion falls on simple-minded Herman Gleib because of his fondness for bats. A blood-thirsty mob hounds Gleib to his death, but the vampire attacks don't stop.

The arrival in a small mountain town of a dissheveled stranger launches a series of murders committed by some sort of animal. As the town doctor and his daughter attempt to help the stranger, the sheriff investigates the murders; and they uncover a sinister experiment involving two rogue scientists, a car accident victim, his wife and children, and a serum that causes a man to turn into a ravaging werewolf.

A young woman is tormented by the belief that she is the victim of a witch's curse.

Once again Paula the ape woman is brought back to life, this time by a mad doctor and his disfigured assistant, who also kidnaps a nurse in order to have a female blood donor.

Paula, the ape woman, has survived the ending of CAPTIVE WILD WOMAN and is running around a creepy old sanitarium run by the kindly Dr. Fletcher, reverting to her true gorilla form every once in a while to kill somebody.

Trapped on a remote island by a hurricane, a group discover a doctor has been experimenting on creating half sized humans. Unfortunately, his experiments have also created giant shrews, who when they have run out of small animals to eat, turn on the humans.

Dr.Decker comes back from Africa after a year, presumed dead. During that year, he came across a way of growing plants and animals to an enormous size. He brings back a baby chimpanzee to test out his theory. As he has many enemies at home, he decides to use his chimp, 'Konga' to 'get rid of them'. Then Konga grows to gigantic proportions and wreaks havoc all over the city of London!!

Dr. Bernard Adrian is a kindly scientist who seeks to cure a young woman's polio. He needs human spinal fluid to complete the formula for his experimental serum. Meanwhile, a vicious circus ape has broken out of its cage, and is terrorizing the townspeople. Can there be a connection?

A man and wife are terrorized by Mad Scientist Dr. Callistratus who was executed but has returned to life with a heart transplant. Along with his crippled assistant Carl, the 'anemic' Mad Scientist, believed to be a vampire, conducts blood deficiency research on the inmates of a prison hospital for the criminally insane to sustain his return to life.

Baron Victor Frankenstein has discovered life's secret and unleashed a blood-curdling chain of events resulting from his creation: a cursed creature with a horrid face — and a tendency to kill.

An insane scientist doing experimentation in glandular research becomes obsessed with transforming a female gorilla into a human...even though it costs human life.

A mad scientist changes his simple-minded handyman into a werewolf in order to prove his supposedly crazy scientific theories - and exact revenge.

A scientist kills innocent victims in his efforts to communicate with his late wife.

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.

After a young woman is coerced into prostitution and her brother framed for murder by an organized crime syndicate, retribution in the form of an ape visits the mobsters.

Dr. Henry Frankenstein attempts to create life by assembling a creature from body parts of the deceased. Aided by his loyal misshapen assistant, Fritz, Frankenstein succeeds in animating his monster, but, confused and traumatized, it escapes into the countryside and begins to wreak havoc. Frankenstein searches for the elusive being and eventually must confront his tormented creation.

Dr. Bonner plans to live forever through periodic gland transplants from younger, healthier human victims. Bonner looks about 40; he's really 104 years old. But people are starting to get suspicious, and he may not make 200.

Dr. Henry Jekyll believes that there are two distinct sides to men - a good and an evil side. He believes that by separating the two, man can become liberated. He succeeds in his experiments with chemicals to accomplish this and transforms into Hyde to commit horrendous crimes. When he discontinues use of the drug, it is already too late.

Dr. Jekyll believes good and evil exist in everyone and creates a potion that allows his evil side, Mr. Hyde, to come to the fore. He faces horrible consequences when he lets his dark side run amok.

A scientist doing experiments on a human fetus discovers a method to accelerate the fetus into a mature adult in just a few days.

A scientist working on cures for rare afflictions, such as a bone softening agent made from molds to allow him to correct the spinal deformity of his nurse, finds the physical causes of lycanthropy in wolf-man Larry Talbot and of vampirism in Count Dracula, but himself becomes afflicted with homicidal madness while exchanging blood with Dracula.

Dr. Henryk Savaard is a scientist working on experiments to restore life to the dead. When he is unjustly hanged for murder, he is brought back to life by his trusted assistant. Re-animated he turns decidedly nasty and sets about murdering the jury that convicted him.

A dog turns from man's best friend into man's worst nightmare as he attacks everything that moves.

A group of teenage girls spends the night in an old dark mansion as an initiation into a college sorority. What they don't know is that the building is actually the headquarters for a mad scientist and his hunchbacked assistant, who are experimenting with turning humans into gorillas.

Seven students answer an advertisement to participate in an experiment to explore how the sensation of pain can be eliminated. Arriving at a secluded institute, they are welcomed by mysterious scientist JB Divay. Initially, JB's fascination with hypnosis, clocks and cactus plants are dismissed by the group as mere eccentricities. But as the students begin to disappear one by one, they begin to question JB's true intentions.

A crazed scientist creates a nerve gas that turns the local teenagers into her unquestioning slaves.

One dark and stormy night, an escaped convict, an embezzler, a runaway daughter, her intended and her father, and a gangster take refuge in a remote inn called "The Black Raven" after the nickname of a second gangster who owns it; and murder ensues.

Mad scientist injects his enemies with acromegaly virus, causing them to become hideously deformed.

Dr. Roger Girard is a rich scientist conducting experiments on head transplantation. His caretaker has a son, Danny, who, although fully grown, has the mind of child. One day an escaped psycho-killer invades Girard's home, killing Danny's father before being gunned down himself. With the maniac dying and Danny deeply unsettled by his father's death, Dr. Girard decides to take the final step and transplant the killer's head onto Danny's body.

After being thrown out of medical school for ethical violations, Dr. Peter Blood returns home to a small Cornish village, where he sets up a research laboratory in a secluded cave. There, he attempts to revive the dead, using kidnapped humans -- who he views as unworthy of life -- for their body parts, specifically, their hearts.

Ruth Earlton has come home to her ancestral mansion to claim her inheritance. Accompanied by her boyfriend, she discovers that her father died suddenly under suspicious circumstances. Now it's her turn, as her deranged and relentless uncle targets her for death with the help of his wife and son, plus a very unhappy ape.

A millionaire's brain is preserved after his death by a scientist and his two assistants, only to create a telepathic monster.

Nicholas Rood, dishonest mine owner, finds a Black Doll on his desk and knows that vengeance is about to overtake him for murdering his former partner. He is knifed as he talks to his daughter Marian. She summons her fiancé Nick Halstead, a private detective. He finds that six people had a motive for the murder; Rood's sister Mrs. Laura Leland; her son Rex; Rood's associates Mallison and Walling; Esteban, a servant and Dr. Giddings. Sheriff Renick and his deputy Red get the clues all mixed up, but Nick finally narrows the search down to one suspect...

Mad scientists turn people into frozen zombies and the zombies wreak havoc and kill people.

When plastic surgeon and mad scientist Don Brandon loses his pinup model wife Anitra in a tragic accident, he and his faithful humpbacked assistant Greg busy themselves experimenting with re-animation. Once ready, the good doctor begins luring young women back to the lab using hypnosis in order to gather select parts to create his wife anew.

After a series of murders, a man finds out that his mother was bitten by a vampire bat during her pregnancy, and he believes that he may be the vampire committing the murders.

A psychological thriller about a research biologist who, angered when an associate is given a position over him based on stolen research findings, agrees to assist his former professor in a cloning experiment in which a duplicate of himself is created -- and which then, with a mind and will of its own, falls in love with the biologist's wife.

A cursed survivor of killings at the Amityville House brings evil to a small island where bizarre genetic experiments are carried out on humans and animals.

A crazed scientist keeps the heads of Nazi war criminals alive until he can find appropriate bodies on which to attach them so he can revive the Third Reich.

Chaney plays two roles: mad scientist Arthur Lamb and Lamb's "experiment", known only as the Ape Man. This hideous creature was the result of Lamb's attempts to transplant animal glands into human beings.

A scientist who is obsessed with creating life finally does it, with tragic results.

A man's ex-wife is found murdered, and he finds himself to be the prime suspect.

Young Raymond Rudford,sculptor, is on trial for slitting the throat of his uncle, who had adopted and raised him after Raymond's parent's died when he was a young boy. The prosecution allows his motive was fear of being disinherited if he married his fiancé, the fair Alicia Atherton, against his uncle's wishes, and the prosecution lays a mountain of evidence against Raymond, including his razor, dragged from an artificial lake on the estate, as the murder weapon; Raymond's bloody fingerprints and footprints found at the scene of bedroom crime, and his bloody shoes, found in his cupboard and bloody monogrammed-handkerchief found under his uncle's death bed. Raymond's only defense is that he could not have committed the crime as he goes into a paroxysm of dread at the mere sight of blood, a phobia he has had ever since childhood when his dog was run over by a lorry and the dog's blood was splattered into his face.

A diverse group of ex-cons-turned-movers are convinced by their creepy client, Vern Muller, to pull an all-nighter for a generous pay bump. As the night progresses and rooms are cleared, they slowly uncover the horrors that exist inside his old Victorian mansion, which include boobytraps, human experimentation, Nazi monsters and more. Will they survive the night?

A couple wash up on an uncharted island where Nazi experiments are going on.

Slip, Sach and the rest of the Bowery Boys enter a haunted house, where they engage in slapstick with a gorilla, a robot and a vampire

At a carnival called the Garden of Evil, a man is murdered, apparently by a gorilla...or someone in a gorilla suit.

Five female filmmakers en route to screen their new horror film in Los Angeles, experience their own real life terror when they cross paths with deranged scientist hellbent on using them for his twisted experiments.

Private eye Jerry Church is hired by a criminal defense lawyer after five mobsters he has gotten acquitted are apparently strangled by a serial killer.