Not surprisingly, many horror movie villains suffer from serious mental illness, mental disorder, or physical ailments that can cause them to behave strangely. Become monsters who commit atrocities against innocent victims, stalking, murdering, raping, molesting and bullying their prey.
Sometimes a vicious cycle of torture, misery, insanity and criminality is created in which the victim becomes the victim of other victims who are often just in the wrong place at the wrong time. Their actions are so horrific that some people confuse their actions with demons, immortal goblins, mutants, ghosts, or demons themselves.
Although these films often allow supernatural and natural possibilities to explain the description of events, medical science usually allows for only one cause, although the cause, mental illness, applies to the villains and victims of films like Stephen King’s enormous, which take many forms to carry out, all horrifying and terrifying.
In Rosemary’s Baby, the 1968 film adaptation of Ira Levin’s 1967 novel of the same title, after moving into a New York City apartment rumored to have been the scene of murder and cannibalism, Rosemary Woodhouse is raped by a “demonic presence.” The sexual assault results in pregnancy, and she believes she is carrying the demon’s child.
Has she experienced an encounter of the worst kind, or is she suffering from postpartum psychosis, a rare condition that may occur within two to four weeks of delivery, as “an overt [easily observed] presentation of Bipolar Affective Disorder (BAD)”?
From a psychological point of view, Woodhouse is not only psychotic but also delusional: she believes that her baby is Satan’s son. However, to some extent, her hallucinations may be caused or enhanced by the “poison/herbs” her husband Guy and his family give her.
Although Rosemary’s baby is likely to be a victim of the chicanery of Gus and his family and of his mother’s psychosis, BAD, and delusions, the movie ends with him as a newborn whose eyes (according to an image that flashes across his mother’s mind) are brown and feral-looking, with slit-like pupils. The infant’s fate remains undisclosed.