Dracula vs. Frankenstein is a 1971 horror film directed by Al Adamson.
A mad scientist (played by J. Carroll Naish) descended from the original Dr. Frankenstein takes to murdering young women for experimentation in hopes of reviving his ancestor's creation, with help from his mute assistant (played by Lon Chaney Jr.). Things start to heat up when Dracula (played by Zandor Vorkov) arrives and promises to revive Frankenstein's monster in return for a serum which will grant him immortality.
This was Lon Chaney Jr.'s final horror film role and J. Carroll Naish's last film. Chaney filmed his part in mid-1969 when the film was titled Blood Seekers; Naish filmed additional footage in 1970 when Dracula and the Frankenstein Monster were added to the story (and in his confrontation scene with Dracula, he appears noticeably older). Regina Carrol appears in the film as one of the people who discover the two title monsters; in reality, she was married to director Adamson. The film was distributed by Troma Entertainment.
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