People who've done bad things, at least. I'm not entirely sure I believe in bad people - or good ones, come to that.

Most prisons are just for dumping problem people in to keep 'em out of the way. That's not what we do 'ere. We're 'ere to give problem people a do-over; time and space to work out what went wrong and 'ow to right it.

Makes it very interesting.