Meet Scientology's highest-level defector, Marty Rathbun. As the former Inspector General of Ethics in the organisation, Rathbun worked closely with its leader, David Miscavige, and celebrity follower Tom Cruise. Now he lives in small town America, a man under siege. "The squirrel himself, how you doing Mr Squirrel?" A woman in a blue poncho cackles at the top of her voice, her wild eyed-face jammed into the camera lens. She's one of the Squirrel Busters who have for months besieged Marty Rathbun's house. They're sent to harass and torment members who leave and then make public their Scientology experiences. It's an incredible turnaround for Marty who had been David Miscavige's number two in the Church and was a master of these 'dirty tricks': "I didn't think twice about silencing critics or punishing someone". The Church may contest Marty's status now, but in 1993 Miscavige describes taking on the head of the IRS, side by side with Marty, as they prevailed in Scientology's greatest ...