Demons of the Mind is a 1972 British horror film, directed by Peter Sykes and starring Gillian Hills, Robert Hardy, Patrick Magee, Michael Hordern and Shane Briant. It was produced by Anglo-EMI, Frank Godwin Productions and Hammer Film Productions, and written by Christopher Wicking, based on a story by Frank Godwin.

Plot

A wealthy widower locks up his two grown-up children, afraid that they will go mad, as did his wife. He then invites a doctor of dubious reputation to supervise their mental health and cure them of the unnatural attraction they have for each other. Meanwhile, in the vicinity of the mansion, murders are happening in the local village and a travelling priest arrives to help drive out any local demons.