Encounters with Evil - Season 1 Episode 1 Thrill Killers

This opening episode of new true crime series Encounters With Evil delves deep into the dark world of those that kill, not for revenge or in a fit of rage - but just for the sheer thrill of it. British serial killer Denis Nilsen - who murdered at least fifteen people - took sexual pleasure from killing and kept the corpses in his home for as long as possible as a twisted form of 'company'.