The film, which received seven Emmy nominations this year, is based on Lawrence Wright’s Pulitzer Prize-winning 2013 book and was coproduced by the UK broadcaster.
The doc features interviews with former high-ranking members of the Church of Scientology, who describe the secretive organization’s history, inner workings, alleged abusive practices and relationships with celebrity believers such as John Travolta and Tom Cruise.
After premiering at the Sundance Film Festival in January, the film had its U.S. broadcast premiere on HBO in May. Sky Atlantic will air the film on September 21 at 9 p.m. GMT.
In April, The Guardian’s sister publication The Observer reported that because Northern Ireland is not subject to the UK’s 2013 Defamation Act, the broadcaster had to delay plans to air the film in April over fears it could expose the network to libel claims from the Church of Scientology or others.
Sky never confirmed that report, saying at the time that a transmission date had not yet been set.
“Both Sky, and the producers of the film, have sought legal advice at every stage of the process and are confident that the film complies with legal requirements in the territories in which we are screening the film,” a Sky spokesperson said in a statement to realscreen.
The church has denounced the film as one-sided propaganda and took out a full-page ad in The New York Times in January in a bid to discredit Gibney.