Mike Flanagan's "Midnight Mass" is a seven-episode Netflix miniseries from 2021 that represents his career-defining achievement in horror filmmaking. The series is a character-driven exploration of personal trauma, faith, and human fragility, marking the culmination of Flanagan's long pursuit of this passion project that he had considered impossible to make for years. Its significance lies in how it demonstrates Flanagan's mastery of blending atmospheric Gothic horror with intimate psychological depth rooted in his own experiences with religion and addiction.

Set on the isolated fishing village of Crockett Island, economically devastated by an oil spill, the narrative follows Riley Flynn (played by Zach Gilford), an atheist recovering from causing a woman's death through drunk driving who returns to his devoutly Catholic hometown. The story intensifies when Father Paul Hill (Hamish Linklater) arrives to lead the parish and begins performing what appear to be Biblical miracles, offering false hope that ultimately leads to spiritual and moral corruption. The production showcases exceptional cinematography, production design, and an accomplished ensemble cast, with technical elements including montages set to Neil Diamond songs and meticulously crafted Gothic folk horror aesthetics that create both beauty and dread.