Top Scientologist: I'd have killed for Tom Cruise cult - 2008-12-06
A-list followers including Tom Cruise, Kirstie Alley and John Travolta believe their faith is the secret of their success.
But for John Duignan it cost him everything and everyone he held dear after he become a leading figure in the church's British branch.
John says he was so brainwashed that he would have killed for Scientology.
And he claims another member was driven to a suicide bid when she was "rehabilitated" after trying to leave.
John tells of his nightmare in his book.