The Manster (1959)

An American journalist stationed in Japan is given a mysterious injection by a mad scientist, turning him into a murderous, two-headed monster.

Directed by: George P. Breakston, Kenneth G. Crane

Starring: Peter Dyneley, Jane Hylton, Tetsu Nakamura, Terri Zimmern, Norman Van Hawley, Jerry Itô

Links: IMDb, Movie posters, Movie stills