The Revenge of Frankenstein

Baron Frankenstein, working under the protective pseudonym Dr. Victor Stein, together with his assistant Dr. Kleve transplants a dwarfs brain into another body. He creates a deranged cannibal. When Frankensteins patients attack and kill him Dr Kleve performs the same operation transferring Frankensteins brain into a new body. As Dr. Frank, the scientist can continue his career.