'The Black Cat'

I love the Wikipedia page for The Black Cat. It has general information and also a summarization of the film's plot.

It goes into detail of the train ride, the accident and all of the tension and bickering between Bela Legosi's and Boris Karloff's characters.

Then, as almost an afterthought, whoever wrote this plot mentions that Karloff's character is going to sacrifice the girl in a Satanic ritual. No big deal. Just a sub-plot of human sacrifice.

Speaking of, I heard one of the Tea Party candidates, just before the recent elections, opined on the very real problem of human sacrifice in the United States. She was not elected. I don't know why.

The Black Cat is a very dark film in case the inclusion of Karloff or Legosi wasn't clue enough. It's very much in the same vein of Edgar Allen Poe, who is credited in the film; however, the film itself bears nothing in resemblance with Poe's short story of the same name.

Karloff's Poelzig was created with the famed occultist Aleister Crowley in mind. And nothing's creepier than Mr. Crowley.