Rupert Procter

Carol worries that a local boy is being abused, and soon she and the police are drawn into a volatile domestic situation with devastating consequences. Elsewhere, Peggy resolves to win the quiz at the Aidensfield Arms by any means necessary.

Luther must confront his demons when a vigilante killer embarks on a crusade to punish past offenders. Meanwhile the campaign within the force to bring him down knows no bounds, threatening everything Luther holds dear and pushing him to his limits.