Dracula vs. Frankenstein, released in the UK as Blood of Frankenstein, is a 1971 American science fiction horror film directed and co-produced by Al Adamson. The film stars J. Carrol Naish as Dr. Durea, a descendant of Dr. Frankenstein who is working on a blood serum for his assistant Groton (Lon Chaney Jr.). The serum soon becomes sought after by Count Dracula (Zandor Vorkov), who hopes that it will grant him the ability to be exposed to sunlight without harm. Other members of the film's cast include Anthony Eisley, Regina Carrol, and Angelo Rossitto.