In the last episode of the series the team struggles to understand the involvement of 12-year-old Kaden Blake in the shooting of mother and carer, Lia Brown. DS Matt Devlin (Jamie Bamber) is drawn to this damaged boy, saddened to see a life doomed by circumstance, furious that gang leader and local dealer Mark Ellis (Charles Mnene) remains untouchable by the law.

Matt forces the hands of the Crown Prosecutors to move Ellis into the frame for the crime. But the culture of intimidation and silence that rules gang life seems set to undo all of their good work.

It’s up to Kaden himself to find the courage to speak out. In doing so, he sets in motion a shattering chain of events. A day that will shake the world of our heroes for ever. Guest stars Lucy Speed.