Marty Rathbun is one of the most senior defectors in Scientology’s history. He was once the Inspector General of Ethics in the organisation that was created by the science-fiction writer L Ron Hubbard, and worked closely with the church’s leader David Miscavige and its most famous member; the celebrity Tom Cruise. Now, Rathbun helps former members; providing counselling, support and auditing services for those who have cut all ties with the church.

This documentary offers a rare insight into the very secretive Church of Scientology from a man who was once at the very top of the organisation.

Scientologists at War airs on Tuesday, 18 March at 21:00 on BBC Knowledge, channel 184 on DStv.