The Mafu Cage (1978)
R · 1h 42min · Drama, Horror, Thriller · 1 December 1978
Ellen has been taking care of her insane younger sister Cissy ever since their explorer father died. When Cissy's pet ape dies in their mansion's dungeon and Ellen finds a boyfriend, Cissy's incestuous desire for her sister turns deadly.
Director(s): Karen ArthurCast: Lee Grant, Carol Kane, Will Geer