The Exorcist - 'Lupus in Fabula'

Evil One got mad Jenga game, yo.

There are a lot of supposed horror series out there that are actually urban fantasy or paranormal romance. The Exorcist is not one of those.

We open with Angela finding Casey talking in her sleep, but in a man's voice that warns her that her mother is watching. Angela films this, and Father Tomas uses the video as evidence to try to get permission for an exorcism. The Church, however, insists on therapy as a first step, despite the fact that no known mental illness results in centipedes nesting in your bed(1) and making crank calls to your mother, let alone empowering the sufferer with mad Jenga skillz and the ability to crack a shinbone at forty paces.

Meanwhile, Father Tomas comes home to find that Father Marcus has broken into his house and established himself as his difficult roommate, like The Odd Couple if the slobbish one was a disgraced former child exorcist squatter with boundary issues. He finds the letters from Tomas' childhood sweetheart and encourages him to break this off, as any secret shame, however objectively innocent, will be used against him by the demon. we also learn that Marcus was taken in by some mad sect of the church as a child and thrown into the exorcism game, which is why he's a mess who annotates his Bible and keeps a scrapbook of horrors.

"Goodnight Marcus, God bless. We'll most likely send you into a cellar to
exorcise a demon in the morning."

Marcus gets Angela to dose Casey with holy water, but Casey holds it down through dinner before vomiting green and centipedes down the toilet(2). Meanwhile, Marcus realises that there are other demons in town, many of them, possessing the homeless. He tries to exorcise one of them, but it turns out that he's lost his mojo and the demon notes that he was the one they all failed, until he lost Gabriel. Tomas goes to see his sweetie, Jenny, who hits on him, which makes him realise that Marcus may be right about this shame thing. So one of our priests has no faith and the other has too much shame. This is going to go well.

The possessees commit a series of home invasion homicides, harvesting organs from their victims, and Casey is visited by a kindly, paternal-looking guy whom no-one else can see, which suggests that the demon has got at her in the first place through the void left when her father's head injury (not Alzheimer's) left her without a strong father figure and her sister's accident deflected what was left of the family's attention from her.

(1) Do you have a problem with giant centipedes? This isn't your show.
(2) Seriously; centipedes. Also vomit.