Skimming through the freebies on a streaming service I came to Serpent’s Lair.  Having written a book about demons, I try to keep an eye out for possession movies I might’ve missed and that may add something new to the discussion.  This one turned out to borrow quite a lot from other films, most noticeably, The Omen.  Tom Bennett and his wife Alex buy a unit in a house that could’ve stepped from Rosemary’s Baby.  I kept wondering what the unnamed city was where they worked.  It turns out that the entire film was shot in Romania, so that’s why identifiable landmarks were missing.  In any case, their unit had been inhabited by a college professor who’d been dabbling in the dark arts.  Some of his stuff was left behind.  By the way, there is a lot of religious imagery in this film—maybe not directly Bible (so not Holy Sequel material), but plenty of religion.

Their kindly next door neighbor is a doctor who smokes a lot for his profession.  The couple adopts a stray cat in the courtyard.  The cat turns out to be a kind of conduit for a succubus.  Naturally, the cat takes a dislike to Alex, finally causing her to fall down the stairs and end up in the hospital.  When she’s out of the house the former resident’s sister comes to close his estate.  I don’t think I’m spoiling anything if I say she is the succubus.  While Alex is away, she coaxes the faithful Tom into a torrid affair.  Tom really loves Alex and is reluctant, but succubi can be very persuasive.  Meanwhile more cats move into the building.  When an archaeological colleague of the former tenant arrives, he notes that said tenant had no sister.  Research indicates Tom is dealing with a Bast succubus.  Of course, the colleague is killed.  Spoiler alert:

It turns out the the doctor next door is Satan himself.  The only way to get rid of a succubus is to set it on fire.  Alex has already left Tom, so the next time the demon shows up, he lights her up.  Satan, next door, sees the whole thing and laughs.  Roll credits.  While a low budget film for its time (1995), it isn’t a cheap movie.  Serpent’s Lair at least tries.  The story is a touch weak because much of this has been done before.  It takes advantage of something that had been discovered a couple of decades earlier—religion is a great setting and source for horror.  Even if the explanation doesn’t really satisfy.