THE WITCHES (also called THE DEVIL’S OWN) was the last film of Oscar winner Joan Fontaine. This Hammer entry in the “older actress do horror” sweepstakes is a low-key, atmospheric thriller about devil worshippers in the English countryside that holds up right until its (for me) unsatisfying finale. But we’ll get to that later.

Miss Fontaine plays Gwen Mayfield, a missionary in darkest Africa attacked in the midst of an uprising by a voodoo cult. After suffering a nervous breakdown, Gwen interviews for a job as a teacher at a private school in Heddaby run by siblings Alan and Stephanie Bax. Alan wears a clerical collar, though Gwen soon discovers when she gets the job he’s not a reverend after all. In fact, the local church is in ruins. She receives a note from Ronnie Dorsett, a gifted student in need of tutoring, about Linda Riggs, a girl he’s sweet on. The note…