Sisters (1972)

  A three-peat of DePalma!  Here we see him returning once more to the absolutely bananas horror of women's bodies.  This is a much better double feature with Carrie or you could slap it up next to Dead Ringers for a Doublemint Evil Twins kind of night.

Grace Collier (Jennifer Salt) witnesses her new neighbor, Canadian model/actress Danielle Breton (Margot Kidder) murder a lover (Lisle Wilson) and rightfully calls the police.  Unfortunately, Grace had just published an article calling the police out as being racist fucks so they are not super-inclined to believe her.  By the time she convinces them to search Danielle's apartment, the body has already been hidden and Grace looks like an asshole.  She still insists that a crime has been committed, however, and hires a private investigator (Charles Durning) to search Danielle's apartment.  That's how she discovers that Danielle had a conjoined twin named Dominique that was constantly referred to as "the disturbed one" while they were institutionalized before separation.  Now Grace has to find enough evidence that Danielle and her creepy-ass ex-husband Emil (William Finley) are guilty before all traces are destroyed.

So this movie stands up as still being extraordinarily creepy and disturbing but not for the reasons the movie thinks.  Let's break it down!  **SPOILERS FROM THIS POINT FORWARD**

What the movie thinks is scary:  ZOMG, you guys, crazy bitch alert!  Danielle seems really pretty and innocent right up until she stabs you in the dick for no reason!

What is actually scary:  Emil stalks Danielle from minute one, drugs, gaslights, hypnotizes, and involuntarily commits Grace into an asylum he run to force her to "become" Dominique so Danielle can break through the trauma of separating from her twin.  That is fucked up and legitimately horrifying.

What the movie thinks is scary:  the cops can't/won't help you, especially if you are a woman or a minority.  Everyone else will enable your rapist/kidnapper in his lies because he is a dude and you are "emotional."

What is actually scary:  ...Okay, the movie is pretty spot-on with that one.

We'll call that a draw.

Obviously, the major theme of this movie is voyeurism and it makes sure you know that there are layers upon layers of people watching people through windows, through cameras, through binoculars, through literal eyes.  It makes the audience accomplices to the crimes, passively complicit in these acts of extreme violence.  For that alone, this would qualify as a horror movie but it also manages to be super stylish and campy as fuck.  If you've only ever seen Margot Kidder as Lois Lane, you really should check this out.  It's streaming on the Criterion Channel because it is Art.