The Witches (1966) (DVD)

Gwen Mayfield, an English schoolteacher working as a missionary in Africa, suddenly finds herself being victimised by a tribe of local witch doctors. Exposed to the deadly powers of the occult she's left deeply traumatised. In an effort to recover Gwen takes up a position in a rural school within the British countryside. But the idyllic village surroundings become increasingly sinister as Gwen begins to uncover a nightmarish web of dark and satanic secrets.