The Brain That Wouldn't Die (1962) has been slammed and lampooned a lot over the years, but one aspects of the film that is usually respected is the fact that it has creative, original ideas behind it. Plus, it's an enjoyable story and still fun to watch.
The story centers on a doctor, who has been experimenting in transplanting limbs and animating dead tissue. His father (also a doctor) disapproves of his methods, but can't argue when his son uses that knowledge to bring a dead patient back to life.
The doctor is called away on urgent business to his country house, and he brings his lovely fiancee with him. Rushing to get there, the doctor crashes the car and his fiancee is decapitated. He grabs her head and runs it up to his laboratory inside his country house. He and his assistant rig up an apparatus that will keep the head alive.
After a while, she awakens, but it is immediately apparent that a new body must be found.
The fiancee is bitter and angry that the doctor would be so unethical as to leave her a body-less freak. She asks repeatedly to die, but her voice falls on deaf ears. Her only communication is with a mutated freak (who is an assemblage of failed experiments) that resides behind a locked door nearby.
Meanwhile, the doctor is out in search of a new sexy body for his fiancee. He goes to a dance hall and watches a girl disrobe.
Liking what he sees, he converses with her and plans to kill her for her body. They are interrupted and he is forced to abandon the plan.
Still in need of a body, he finds an artist's model with a body that really turns him on.
He lures her back to his lab, drugs her and plans the removal of her head.
The fiancee is not happy about this, so he tries to shut her up.
Can she persuade the horrible freak in the closet to put a stop to this madness?
The Brain That Wouldn't Die- movie trailer