A Panorama special about the Church of Scientology. Reporter John Sweeney returns to his investigation, listening to the claims of a whistleblower from within the organisation.

Reporter John Sweeney's last investigation into the Church of Scientology resulted in an explosive confrontation with church officials. This time, in a Panorama Special, one of those officials has turned whistleblower to help him reveal the dark secrets of the church, which boasts Hollywood A-listers Tom Cruise and John Travolta among its devotees.