This production has everything an old chiller ought to have: an American in England, a spooky old mansion, locals frightened of the spooky old mansion, a pretty girl who knows not the evil which surrounds her, creepy old people with a creepier family history, monsters, pseudoscience, the occult, and more. It all ends up being both too much and not enough, altho Boris Karloff is certainly acting his heart out. The scripting is clumsy: the elements are too traditional and elementary, everyone knows something they refuse to tell for no particular reason, the heavies are homicidal for no logical reason, the hero is afraid of nothing yet makes no effort to pursue attackers.... Worse, the directing is flat and the leads have little charisma or chemistry. It's occasionally effective, but mostly boring, which is death to the chiller genre. I want to say "Die, movie, die!" but it's just not that offensive.