

Line of Duty
If you think catching criminals is tough, try catching police officers.
A drama about the investigations of AC-12, a controversial police anticorruption unit.
Seasons

Series 1
5 episodes
DS Steve Arnott is transferred to the police anti-corruption unit after the death of a man in a mistaken shooting during a counter-terrorist operation by another cop.
Episodes

Series 2
6 episodes
An ambush of a police convoy results in three police officers dead and a protected witness seriously injured. The sole surviving police officer is Detective Inspector Lindsay Denton. Deputy Chief Constable Mike Dryden takes personal charge, assigning AC-12 to the case. Initially AC-12’s most valuable witness, the suspicion soon arises that Denton could be their prime suspect. In the pursuit of corruption, how far will they go to uncover the truth?

Series 3
6 episodes
After a criminal is shot dead during a police raid, the AC-12 team begins examining the conduct of Sergeant Danny Waldron, leader of an elite unit. But Waldron’s loyal team obstructs the investigation, and the truth about the shooting proves more complicated than Arnott and Fleming could ever have imagined.

Series 4
6 episodes
The fourth series sees AC-12 facing their most devious opponent yet! Under pressure from her superiors, DCI Roz Huntley charges a young man with a series of murders after months of fruitless investigation, but is he guilty? The Chief Forensic Investigator has doubts and turns to AC-12.

Series 5
6 episodes
Series 5 follows the actions of Superintendent Ted Hastings, D.I. Kate Fleming and D.S. Steve Arnott as they investigate an Organised Crime Group with links to missing undercover officer D.S. John Corbett.

Series 6
7 episodes
Series 6 sees AC-12 facing their most enigmatic adversary so far: Detective Chief Inspector Joanne Davidson, the senior investigating officer of a high-profile unsolved murder.
Cast

Martin Compston
DS Steve Arnott

Vicky McClure
DC Kate Fleming

Adrian Dunbar
SI Ted Hastings

Gregory Piper
Ryan Pilkington

Nigel Boyle
DI Ian Buckells

Kelly Macdonald
DCI Jo Davidson

Owen Teale
Philip Osborne

Anneika Rose
Farida Jatri

Matthew Forsythe
Suitor