House of Dracula (1945) on Netflix

Baron Latos appears to Dr. Edelman in the middle of the night and reveals that he's really Count Dracula. He seeks a cure for his vampirism. A trip to the basement shows that Dracula has already taken the liberty of moving in - there's his coffin, filled with the dirt from his own grave. Dr. Edelman takes this brazenness in stride while refusing to believe in the supernatural. Later, Lawrence Talbot shows up, asking for a cure for his lycanthropy. He can't bear to change into a werewolf one more time. Edelman must save Talbot from a suicide attempt when Talbot throws himself into the ocean and gets swept into a cave. While in the cave, Edelman and Talbot find Frankenstein's monster. Edelman decides to revive him, but Talbot and Edelman's hunchbacked female assistant talk him out of it. Meanwhile, Edelman's other assistant finds herself seduced by Count Dracula; while Edelman finds the evil count has an even more powerful influence over his own life.