Villain(s)  Mad doctor, werewolf, vampire, Frankenstein's creature

Actor(s):  Lon Chaney, Martha O'Driscoll, John Carradine, Lionel Atwill

Brief Description  House of Dracula (1945) is a classic Universal Pictures horror film directed by Erle C. Kenton. Serving as a direct sequel to House of Frankenstein (1944), it is one of the final "serious" ensemble films of the original Universal Monsters era, famously bringing together Count Dracula, the Wolf Man, and Frankenstein's Monster under one roof.

Plot:
Dracula's Request: The film begins at the oceanfront castle clinic of Dr. Franz Edelmann, a brilliant scientist known for treating inexplicable medical anomalies. In the dead of night, a bat enters and transforms into Count Dracula (traveling under the alias Baron Latos). Unlike traditional appearances, Dracula claims he is exhausted by his curse and begs Dr. Edelmann to find a scientific cure for his vampirism. Edelmann agrees, explaining the condition as a blood parasite, and begins preparing an antitoxin with the help of his hunchbacked assistant, Nina.

The Wolf Man Arrives: Shortly after, Lawrence Talbot (the Wolf Man) arrives desperate for a cure to his lycanthropy. Because the moon is rising, Talbot demands to be locked in a town jail cell. Edelmann witnesses Talbot's agonizing transformation into a werewolf first-hand. Believing pressure on the brain causes the lycanthropy, Edelmann promises a surgery using specialized plant molds to cure him. Unable to handle the delay, a despondent Talbot attempts suicide by leaping off a cliff into the ocean below.

Discovery in the Sea Cave: Talbot survives the fall but washes into a deep network of subterranean coastal caves. Dr. Edelmann lowers himself down to rescue him. Inside the caves, they find the catatonic body of Frankenstein's Monster preserved in stasis alongside the skeleton of the previous movie's villain, Dr. Niemann. Edelmann brings the Monster up to his laboratory via a hidden staircase but decides against reanimating it.

Dracula's Betrayal and the Evil BloodDracula's quest for a cure is revealed to be a ruse. He becomes infatuated with Edelmann's beautiful nurse, Miliza Morelle, and attempts to seduce her and turn her into a vampire. During a medical transfusion designed to cleanse Dracula's blood, the Count hypnotizes the laboratory staff. He reverses the flow, pumping his own cursed vampire blood directly into Dr. Edelmann's veins. When Dracula attempts to kidnap Miliza, Edelmann awakens and drives him away with a cross. As dawn breaks, Edelmann traps Dracula inside his coffin and exposes it to direct sunlight, destroying the vampire.

Madness and the Climax: The contamination from Dracula's blood triggers a tragic Jekyll-and-Hyde personality split within Dr. Edelmann. He successfully performs the surgery on Talbot—permanently curing him of his werewolf curse—but then reverts into a manic, murderous alter-ego. The corrupted doctor murders a local gardener and uses his remaining sanity to fully reanimate Frankenstein's Monster. The townspeople, discovering the murder, storm the castle. In the ensuing chaos, a fully cured Talbot is forced to shoot the mad Dr. Edelmann to save Miliza. The laboratory catches fire, trapping Frankenstein's Monster beneath falling debris as the castle burns.