Murphy and his team recover a gun that may be linked to Lyra McKee's murder. A DNA lead gives detectives their first direct route into the network surrounding the killing. Drawing on forensic evidence, intelligence, CCTV and mobile phone footage, detectives believe they can finally put a name to the masked figure at the centre of the case. Murphy launches a series of high-risk operations targeting those suspected of involvement. The stakes are immense. As the hunt enters a decisive new phase, Lyra's family's agonising wait for answers continues