WATCH: Trailer for Scientology documentary Going Clear

Going Clear: Scientology and the Prison of Belief looks like the kind of film that could make a lot of people unhappy. The upcoming documentary, which premiered at Sundance, will cast a critical and controversial eye on the workings of the church of scientology. The words 'scathing' and 'devastating' have already been used to describe it.

The teaser keeps things vague but tense with samples from interviews and spare imagery.

The film, which merges archival footage, new testimonies and dramatic reconstructions, will premier on HBO on March 29.