Investigative journalist John Sweeney is known for what he calls his "explosive" documentaries at BBC Panorama. In this intimate interview, he says what it was like to be harassed by the Church of Scientology; explains how he challenged the evidence of Professor Roy Meadow to help free cot death mum Sally Clark and six others, and recounts the challenges of going undercover in war zones like Chechnya, Zimbabwe and North Korea.

0.55 - Covering the Paris attacks

10:55 - ISIS brainwashing and reporting the Syrian war

13:00 - Maintaining sanity in a warzone

23:38 - What motivates him as a journalist

25:05 - The Church of Scientology and his famous on-screen 'meltdown'

28:37 - Redundancy and BBC charter renewal

31:42 - "The best thing I have ever done..."