This article contains massive spoilers for "Heretic."

Do you believe in something because you fundamentally believe it to be true with every fiber of your being, or do you believe something because it's all you've ever known? This is the philosophical question posed by Mr. Reed (Hugh Grant) in the heart of "Heretic," the critical horror hit from "65" directing duo Scott Beck and Bryan Woods. After two unsuspecting Mormon missionaries named Sister Barnes (Sophie Thatcher) and Sister Paxton (Chloe East) arrive at Mr. Reed's door to spend a minute talking about the Church of Jesus Christ of Latter-day Saints he used a charming sweater vest and the promise of blueberry pie to lure them into the house. There, they are thrust into a fight for their lives that will force them to question their faith in religion, their fellow man, and their own understanding of reality.

In his review of "Heretic,...