In the new horror movie, "Heretic," Hugh Grant plays a diabolical religious skeptic who traps two scared missionaries in his house and tries to violently shake their faith.

What starts more as a religious studies lecture slowly morphs into a gory escape room for the two door-knocking members of The Church of Jesus Christ of Latter-day Saints, underscoring just how well-suited religion can be for terrifying and entertaining thrill-seeking moviegoers.

"I think it is a fascinating religion-related horror as it raises questions about the institution of religion, the patriarchy of religion," said Stacey Abbott, a film professor at Northumbria University in Newcastle, England, whose research interests include horror, vampires and zombies.

"But it also questions the nature of faith and confronts the audience with a debate about choice, faith and free will."

Horror has had a decades-long attraction to religion, Christianity especially in the U.S., with the 1970s "The Exorcist" and "The Omen" being prime examples. Beyond the jump scares, the supernatural elements of horror and its sublime nature pair easily with belief and spirituality — and religion's exploration of big existential questions, Abbott said. Horror is subversive. Real-life taboo topics and cultural anxieties are fair game.

"It is a rich canvas for social critique and it can also be a space to reassert traditional values," Abbott said in an email.

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Religions and horror tackle similar questions about what it means to be human — how people relate to one another and the world, said Brandon Grafius, a Biblical studies professor at Ecumenical Theological Seminary in Detroit and an expert on... Read More