The Incredible Two-Headed Transplant | 1970
Wealthy research scientist Dr. Roger Girard has been experimenting with head transplantation. The caretaker on his property has a grown son, Danny, who has the mentality of a child and is powerfully strong. A psychopathic killer invades Girard's home, murdering the caretaker before being shot to death himself. Girard takes the opportunity to transplant the dead killer's head onto Danny's body and before long, the two-headed creature has run off into the surrounding countryside to cause mayhem.