Previously on The Exorcist: teenage homework-enthusiast Casey Rance is possessed by a demon, and is occasionally counseled by a malevolent old man whom only she can see. The death of a friend has rendered Casey's sister, Kat, relatably pouty. Their father, played by Cameron from Ferris Bueller, may or may not be pulling a Cameron and feigning some kind of mental break. The mother, Angela, played by Geena Davis, is seeking help with her demon problems from dreamboat priest Father Tomas, who teams up with UNHINGED BADASS PRIEST Father Marcus, WHO CARES MORE ABOUT JUSTICE THAN ABOUT SOCIAL NICETIES! Meanwhile, every homeless person in Chicago is also possessed and doing the devil's work-- specifically murdering people and harvesting their organs-- but no one in Chicago seems to find this unusual. Also, the Pope is coming.