So much about this film makes no sense.The juxtaposition of American and South African accents with no sense of where its supposed to be set.The killer is a complete blank,we never find out if hes a "demon" of the title or just some homicidal nut.Many of the murders make no sense whatsoever,he kidnaps women,kills people randomly and does this weird heavy breathing.Police are nowhere to be seen.And it feels like two different films merged into one,with the Cameron Mitchell psychic subplot being only connected via the killer with the two nubile young women whose scenes in a state of undress are the highlight.As mentioned by others the transfer to DVD is terrible,my copy also wrongly states the release year as 1971.