John Sweeney investigates the Church of Scientology, endorsed by Hollywood celebs such as Tom Cruise and John Travolta, but which continues to face the criticism that it is less of a religion and more of a cult. Some former members claim the Church uses a mind control technique called 'bull-baiting' to put opponents at a psychological disadvantage, and Sweeney is shouted at, spied on, visited in his hotel at midnight and chased around the streets of LA by sinister strangers in hire cars.