6.0/102,854 votesLoading...#1 - Episode 7
Season 6 Episode 7 - Aired 5/2/2021
With time running out, AC-12 attempt to unmask 'H', the Fourth Man (or Woman) commanding the network of corrupt officers behind the murder of Gail Vella. But sinister and powerful forces appear intent on orchestrating a cover-up.
Director: Jennie Darnell
Writer: Jed Mercurio
7.7/101,938 votesLoading...#2 - Episode 1
Season 1 Episode 1 - Aired 6/26/2012
When Steve Arnott is transferred to a police anti-corruption unit, he finds his target is the city's top detective, Tony Gates. Can Gates really be as good as he appears? Arnott must engage in a cat-and-mouse struggle to uncover Gates' secret.
Director: David Caffrey
Writer: Jed Mercurio
7.7/101,420 votesLoading...#3 - Episode 1
Season 6 Episode 1 - Aired 3/21/2021
DCI Jo Davidson receives new information about the whereabouts of a suspect in the unsolved murder of investigative journalist Gail Vella. En route to raid the property, she spots an armed robbery in progress and stops the convoy. Suspicious of her motives, AC-12 launch an investigation. Still dealing with the fallout from their explosive investigation into undercover officer John Corbett, AC-12 soon realise they are facing their most enigmatic adversary yet.
Director: Daniel Nettheim
Writer: Jed Mercurio
8.0/101,560 votesLoading...#4 - Episode 3
Season 1 Episode 3 - Aired 7/10/2012
Arnott is convinced Gates played a part in Jackie's disappearance. With Fleming's help, the anti-corruption team tries to trap Gates into revealing his involvement in covering up Jackie's crimes.
Director: David Caffrey
Writer: Jed Mercurio
8.1/101,637 votesLoading...#5 - Episode 2
Season 1 Episode 2 - Aired 7/3/2012
Having been duped into covering up Jackie's crime, Gates is desperate to sever ties with her. But, as Arnott and Fleming close in on his secret, Gates is plunged into an even more dangerous situation than he first thought.
Director: David Caffrey
Writer: Jed Mercurio
8.1/101,502 votesLoading...#6 - Episode 4
Season 1 Episode 4 - Aired 7/17/2012
Desperate for proof of Gates's corruption, Fleming pushes her relationship with him to the limit. But her behaviour causes Morton to question if she might not be such a loyal colleague after all.
Director: Douglas Mackinnon
Writer: Jed Mercurio
8.1/101,242 votesLoading...#7 - Episode 2
Season 4 Episode 2 - Aired 4/2/2017
AC-12 crank up their investigation into Operation Trapdoor. Kate makes progress in her undercover role.
Director: Jed Mercurio
Writer: Jed Mercurio
8.1/101,146 votesLoading...#8 - Episode 2
Season 6 Episode 2 - Aired 3/28/2021
Having opened an official inquiry into DCI Jo Davidson and Operation Lighthouse, AC-12 begin to suspect a cover up. Steve and Chloe dig into Gail Vella’s controversial reporting for clues to her murder, and find links to previous AC-12 cases. Their investigation takes a shocking turn when they begin to scrutinise Jo's personal life.
Director: Daniel Nettheim
Writer: Jed Mercurio
8.2/101,316 votesLoading...#9 - Episode 3
Season 2 Episode 3 - Aired 2/26/2014
Lindsay is denied bail and finds herself targeted in prison. Growing increasingly desperate, she tells Kate about a relationship with an executive police officer and her theory of why she is being framed.
Director: Douglas Mackinnon
Writer: Jed Mercurio
8.2/101,355 votesLoading...#10 - Episode 6
Season 2 Episode 6 - Aired 3/19/2014
AC12's investigation finally exposes a vicious criminal gang run from within the police. But while Steve now appears convinced of Lindsay's innocence, Kate remains determined to prove she had a role in the ambush.
Director: Daniel Nettheim
Writer: Jed Mercurio
8.2/101,112 votesLoading...#11 - Episode 3
Season 6 Episode 3 - Aired 4/4/2021
On the strength of evidence from a new witness, DCI Jo Davidson brings Terry Boyle back in for questioning about Gail Vella's murder. Kate is torn between loyalty to Jo and wanting to assist AC-12's investigation, and tensions increase when Kate encounters a face from the past with links to organised crime.
Director: Gareth Bryn
Writer: Jed Mercurio
8.2/101,169 votesLoading...#12 - Episode 6
Season 6 Episode 6 - Aired 4/25/2021
As AC-12 struggle to deal with the repercussions of tragic events, Hastings makes one final bid to uncover institutionalised corruption before his time runs out.
Director: Jennie Darnell
Writer: Jed Mercurio
8.3/101,630 votesLoading...#13 - Episode 5
Season 1 Episode 5 - Aired 7/24/2012
With Gates on the run, the anti-corruption team come under pressure to close the case once and for all. Arnott is forced to make some tough decisions about where his loyalties lie. Fleming and Hastings go all out to catch Gates, leading to a shattering conclusion.
Director: Douglas Mackinnon
Writer: Jed Mercurio
8.3/101,305 votesLoading...#14 - Episode 2
Season 3 Episode 2 - Aired 3/31/2016
After the shooting at the drugs house, DC Fleming increases the pressure on Danny Waldron.
Director: Michael Keillor
Writer: Jed Mercurio
8.4/101,307 votesLoading...#15 - Episode 4
Season 2 Episode 4 - Aired 3/5/2014
Following the violent attack she suffered in prison, Lindsay is granted special dispensation to visit her dying mother. Meanwhile, deputy chief constable Dryden shrugs off allegations about his relationship with Lindsay and possible links to the ambush.
Director: Daniel Nettheim
Writer: Jed Mercurio
8.4/101,282 votesLoading...#16 - Episode 3
Season 3 Episode 3 - Aired 4/7/2016
DS Steve Arnott believes there is a dark secret in Danny Waldron's past.
Director: Michael Keillor
Writer: Jed Mercurio
8.4/101,288 votesLoading...#17 - Episode 4
Season 3 Episode 4 - Aired 4/14/2016
Fresh testimony launches AC-12 back on the trail of a corrupt officer.
Director: John Strickland
Writer: Jed Mercurio
8.4/101,472 votesLoading...#18 - Episode 1
Season 4 Episode 1 - Aired 3/26/2017
DCI Roz Huntley is under intense pressure from her superiors to apprehend a serial murderer after months of fruitless investigation.
Director: Jed Mercurio
Writer: Jed Mercurio
8.4/101,205 votesLoading...#19 - Episode 3
Season 5 Episode 3 - Aired 4/14/2019
Corbett's most daring plan yet requires McQueen to exploit links with corrupt police officers.
Director: John Strickland
Writer: Jed Mercurio
8.4/101,400 votesLoading...#20 - Episode 6
Season 5 Episode 6 - Aired 5/5/2019
In a nail-biting 90-minute finale, Hastings's secrets are laid bare. Will 'H' be revealed at last?
Director: Susan Tully
Writer: Jed Mercurio
8.5/101,600 votesLoading...#21 - Episode 1
Season 2 Episode 1 - Aired 2/12/2014
A brutal ambush on a police convoy leaves three officers dead and a protected witness fighting for his life. AC-12 turn their spotlight on Lindsay Denton, the officer who led the convoy but escaped unscathed.
Director: Douglas Mackinnon
Writer: Jed Mercurio
8.5/101,399 votesLoading...#22 - Episode 2
Season 2 Episode 2 - Aired 2/19/2014
Following the tragedy at the hospital, AC12's Kate Fleming is planted undercover in Lindsay Denton's Missing Persons Unit. But Lindsay in turn gathers compromising evidence against the anti-corruption team.
Director: Douglas Mackinnon
Writer: Jed Mercurio
8.5/101,269 votesLoading...#23 - Episode 4
Season 4 Episode 4 - Aired 4/16/2017
Roz's husband Nick is brought in for questioning by AC-12. But while Nick denies any involvement in Steve's attack, his suspicions about Roz mount.
Director: John Strickland
Writer: Jed Mercurio
8.5/101,228 votesLoading...#24 - Episode 5
Season 4 Episode 5 - Aired 4/23/2017
DCI Roz Huntley struggles to allay her husband's suspicions. AC-12 find a new angle to pursue their case against her.
Director: John Strickland
Writer: Jed Mercurio
8.5/101,487 votesLoading...#25 - Episode 1
Season 5 Episode 1 - Aired 3/31/2019
Following the deadly hijack of a police convoy, AC-12 target a ruthless organised crime group known to have links with corrupt officers.
Director: John Strickland
Writer: Jed Mercurio
Worst Episodes Summary
"Episode 7" is the worst rated episode of "Line of Duty". It scored 6/10 based on 2854 votes. Directed by Jennie Darnell and written by Jed Mercurio, it aired on 5/2/2021. This episode scored 1.7 points lower than the second lowest rated, "Episode 1".