An upcoming HBO documentary exposes alleged abuses within the Church of Scientology.

“Going Clear: Scientology and the Prison of Belief” claims that the church abuses members who want to leave, going so far as to blackmail and tap the phones of those who speak out against the church. The film alleges that some people are even put in a prison called “the hole.”

“It’s ugly, there’s no question,” former Church of Scientology spokesperson Mike Rinder told Megyn Kelly.

Rinder charged the church with “egregious violations of human rights.”

He also said it’s true that the Church of Scientology tapped Nicole Kidman’s phone when she was married to Tom Cruise.

“Going Clear” will debut on HBO on March 29.

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