We don't have an overview of this episode, please check back later.
Child protection expert and former policeman, Mark Williams-Thomas, follows officers in the Metropolitan Police's Paedophile Unit. Detectives go into internet chat rooms posing as teenage girls and investigate the startling number of paedophiles trawling for images and sex. The programme reveals the disturbing exchanges and tricks that the men use to entice children to show nude pictures of themselves and meet up for sex.
,
