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Line of Duty poster
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Line of Duty

"If you think catching criminals is tough, try catching police officers."

8.2
7 seasons
36 episodes
Returning Series
Crime
Drama
Mystery

Plot Summary

A drama about the investigations of AC-12, a controversial police anticorruption unit.

First Aired:June 26, 2012
Last Aired:May 2, 2021
Episode Runtime:1h 0m
Networks:
BBC One, BBC Two
Created By:
Jed Mercurio

Cast & Characters

Where to watch free (US)

The CW
Hoopla
Plex
Plex Channel
Fawesome
The Roku Channel
Pluto TV
Amazon Prime Video Free with Ads
Tubi TV

Seasons (8)

Series 1
7.5

Series 1

5 episodes

Aired: 2012

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.

Series 2
8.4

Series 2

6 episodes

Aired: 2014

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
8.4

Series 3

6 episodes

Aired: 2016

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
8.3

Series 4

6 episodes

Aired: 2017

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
8.5

Series 5

6 episodes

Aired: 2019

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
7.5

Series 6

7 episodes

Aired: 2021

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.

Season 7

Season 7

0 episodes

Production

World Productions

BBC Drama Productions