Every episode from all six series of the British crime drama starring Martin Compston, Vicky McClure and Adrian Dunbar as police officers looking to root out corruption within the force. In the first series, Detective Sergeant Steve Arnott Compston is transferred to AC-12, a unit assigned to investigate corruption within the police force. Working with Detective Constable Kate Fleming McClure, Arnott quickly finds himself immersed in a case involving Detective Chief Inspector Tony Gates Lennie James. In the second series, an ambush of a police convoy sparks alarm when three officers are killed and a witness in protective custody is seriously injured. With only one survivor, Detective Inspector Lindsay Denton Keeley Hawes, department AC-12 is brought in to solve the case. In the third series, Sergeant Danny Waldron Daniel Mays and his team are assigned the case of a suspected gang member who has been arrested on suspicion of plotting a gangland murder. When Waldron shoots the suspect in