For its part, the Church has vehemently denied the claims made in Going Clear. “The Church has ... has been publicly shunned by other famous Scientology believers, specifically, Kirstie Alley ...

Shepard also brought up the Emmy-winning and controversial Scientology documentary Going Clear, and posed the question of why his friends who are members of the religion won’t watch the film.

The first trailer has just been released for director Alex Gibney's explosive HBO documentary about Scientology, "Going Clear," which is based on Lawrence Wright's best-selling book of the same name.