Series follows anti-corruption unit 12 (AC-12) as they investigate fellow police officers accused of corruption. In series five, Stephen Graham stars as John Corbett, the ruthless leader of an organized crime group who hijacks a seized drugs transport. AC-12 investigators suspect corrupt police officers of leaking information. As the body count rises, AC-12 realizes they're facing their most vicious adversary yet.

In the thick of a career-defining case, Roz is under intense pressure to prove herself to her superiors. But when she faces conflict with a colleague, it's not long before AC-12 decide to probe her handling of the investigation.

Season two has Lindsay Denton, a member of AC12, a police anti-corruption unit, charged with investigating an ambush of a police convoy.

The hit mystery drama series, set in a Dorset coastal town.

Detective Chief Inspector Tony Gates is an exemplary cop. He's got the best crime stats on the force and a loyal team working under him. But the head of the police anticorruption unit, Superintendent Ted Hastings, has his doubts about Gates. Is he really that good? And more importantly, is he really that clean? Hastings decides to find out and all on a new arrival to his department, Detective Sergeant Steven Arnott to help him do it. As the net tightens...