Jamali Maddix is on a mission to find out what's driving people to join extreme subcultures and communities, and what their leaders promise.
In this episode he travels across America to spend time with some of the country's most prolific vigilante paedophile hunters, both at home and on the road.
Immersed in their morally murky world, Jamali questions the hunters' methods and motivations, whilst also getting to grips with their huge and growing fanbases.