The Manster (1962)
Film / Horror / Science Fiction
aka "The Split"
Directed by George P. Breakston and Kenneth G. Crane
Cast: Peter Dyneley, Jane Hylton and Satoshi Nakamura
An American reporter in Japan is sent to interview an eccentric Japanese scientist working on bizarre experiments in his mountain laboratory. When the doctor realizes that the hapless correspondent is the perfect subject for his next experiment, he drugs the unfortunate man and injects him with a serum that gradually transforms him into a hideous, two-headed monster.