I started watching this film thinking it had potential but would probably be a let down. No, no I was incorrect. This 1970 fairly well-made film is disturbing. Very disturbing.
As the DVD tells me, Crucible of Horror is about: "The patriarch of a British family [who] seems to take delight in physically and psychologically torturing his wife and daughter while revering his son, who shares in abusing his mother and sister. Finally fed up with the abuse, the mother and daughter plot to do away with the father to end their suffering. After it appears their plan is successful, the mother and daughter must deal with the disappearance of the body and its random appearance in the strangest places and at the most inopportune times."
Although this is a paranormal horror movie, unfortunately abuse like the patriarch inflicts occurs with alarming regularity around the world - which means you might see something similar to the film on the 6:00 P.M. news. Watch this film or watch the news, either way everyone should discus more openly the seriousness of ongoing abuse and sexism.