Twins of Evil (1971)

The Monty Python-esque cries of “Burn her! Burn the witch!” are unintentionally hilarious, but otherwise it's typical Hammer. Peter Cushing gives an especially fine performance as a hard-assed, witch-hunting man of God determined to keep his comely nieces as chaste as possible without actually chaining them to a fireplace. The nieces are real life twins Mary and Madeleine Collinson, aka Playmates of the Month, October 1970. It may have been a cynical move by Hammer to hire nude models, but both women are praiseworthy as actresses, so it turned out well.
It’s the final part of the loosely connected Karnstein Trilogy; the others are The Vampire Lovers (1970) and Lust for a Vampire (1971).

3 servants of the devil out of 5