Twins of Evil

A puritan brotherhood burns young women as witches in a central European village. Cushing's Gustav Weil is their leader and the moral rot of the film: he burns the innocent and misses the actual vampire in his own house.

It is the third of Hammer's Karnstein trilogy, loosely from Le Fanu's Carmilla, and the most interesting because it makes the witch-hunter the horror. Cushing had just lost his wife and plays Weil with a coldness that is truly frightening.

Mary and Madeleine Collinson, identical twins, play the good and corrupted sisters, and the gimmick is that Weil cannot tell which is which and burns on suspicion.

It is late Hammer, when the studio was adding more sex to compete, and it is one of the few from that period that works as more than that.