But people don't change their beliefs easily. Even when their deepest convictions are challenged - by the failure of the world to end, for example - they continue on their way, sticking to the old routine: they get back on their weird bikes and ride again.

Not counting the brand of Sunni Islam practised by the so-called Islamic State, there is probably no religion in the world that comes in for more flak than Scientology.

Meeting forensic patients for the first time could occasionally be an unnerving experience. They often came across as mild and gentle people, but the details of the crimes were harrowing in the extreme.

I am genuinely a bit confused about the world, a little bit bumbling.

There have been times when I've felt inappropriately emotional. I remember making 'The Most Hated Family in America' about the Westboro Baptist Church, and being on the way to a funeral of a U.S. soldier with the Phelps family; they were going to picket the funeral.

The thing is, I have never been that confident, and, um, I have a lot of self-doubt, and I had never - I don't think I ever would have consciously chosen to be a television presenter.