Alain Hardy

After a jewel robbery goes horribly wrong and their leader, Jack (Naschy), is shot in the head, a band of thieves goes to a local doctor for help. To save their friend's life, the criminals devise a unique solution: kill their psychopathic worst enemy, toss his body onto a railroad track in front of an oncoming train, and use the severed head for a brain transplant! Unfortunately the unwilling donor, the Sadist, turns Jack into a raging lunatic bent on murder and destruction (Image Entertainment)