Twins of Evil (1971)

Directed by John Hough
My rating: 2.5 stars out of 4
IMDb
(MGMHD)

Another sex-and-vampires movie from Hammer. Peter Cushing is excellent as a Puritan witch hunter. When his two nieces, played by Playmate twins Madeleine and Mary Collinson, move in with him, they rebel against his puritanical ways. One of them is particularly taken by Count Karnstein who lives in the castle on the hill. Only problem is that he is really a vampire and likes to conduct satanic rites. Well, Cushing eventually is placed in the position to kill his niece, but naturally with twins it's hard to tell who is who, with one now a vampire. However, I was left with the impression that the real "twins of evil" were not the girls, but Cushing and the Count, only Cushing was posing as a Puritan.