Horror directed by Juan Fortuny and starring Paul Naschy, Silvia Solar and Olivier Mathot. When a gang leader is killed, his cronies go to extreme lengths in order to bring him back. Strapping a helpless victim to a railway track and taking his dismembered head for themselves, they enlist the help of an insane surgeon in transplanting the mind of their boss into this new head, thinking that this will return him to them. The gang quickly realise they've got far more than they bargained for when the monstrous new person before them immediately sets out on a bloody path of death and destruction.

Howard Vernon returns as the demented Dr Orloff, who, in this chiller, creates an invisible human in order to kidnap his partner's daughter, with whom he's obsessed.