In this free episode of Killer Britain, Dermot Murnaghan tells the story of Mark Martin, who viciously targeted homeless women in his quest to become 'Nottingham's first serial killer'. Hosted and curated by one of the UK’s best-known journalists Dermot Murnaghan, Killer Britain explores British murder stories filled with detective intrigue and chilling storylines of homicide and hate. In each episode, Dermot recounts a case he has reported on or followed at close quarters. The murder stories are told with archived footage and key interviews from those closest to the case, including testimony from family members of the victims and the investigating officers who first arrived on the scene to witness the aftermath of the murders.