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The Best Episodes of Line of Duty

Every episode of Line of Duty ranked from best to worst. Let's dive into the Best Episodes of Line of Duty!

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

Genres:CrimeDramaMystery

Top Episode Highlight

The best episode of "Line of Duty" is "Episode 6", rated 9.5/10 from 2655 user votes. It was directed by John Strickland and written by Jed Mercurio. "Episode 6" aired on 4/28/2016 and is rated 0.4 point(s) higher than the second highest rated, "Episode 5".

  • Episode 6
    9.5/10 2,655 votes

    #1 - Episode 6

    Season 3 Episode 6 - Aired 2016-04-28

    DS Steve Arnott is arrested on suspicion of murder but continues to protest his innocence.

    Director: John Strickland

    Writer: Jed Mercurio

  • Episode 5
    9.1/10 1,546 votes

    #2 - Episode 5

    Season 3 Episode 5 - Aired 2016-04-21

    Loyalties are divided when DS Steve Arnott comes under scrutiny from his colleagues.

    Director: John Strickland

    Writer: Jed Mercurio

  • Episode 6
    9.0/10 1,469 votes

    #3 - Episode 6

    Season 4 Episode 6 - Aired 2017-04-30

    While Nick Huntley faces lengthy questioning, AC-12 remain convinced of Roz's involvement.

    Director: John Strickland

    Writer: Jed Mercurio

  • Episode 4
    9.0/10 1,457 votes

    #4 - Episode 4

    Season 6 Episode 4 - Aired 2021-04-11

    DCI Jo Davidson faces increasing pressure from all sides as AC-12 make major breakthroughs in the investigation, but an attempt to interview a key witness goes horribly wrong.

    Director: Gareth Bryn

    Writer: Jed Mercurio

  • Episode 4
    8.9/10 1,325 votes

    #5 - Episode 4

    Season 5 Episode 4 - Aired 2019-04-21

    Tensions rise in the OCG following the events at Eastfield. With troubling questions hanging over the identity of ‘H', suspicions mount at AC-12.

    Director: John Strickland

    Writer: Jed Mercurio

  • Episode 5
    8.9/10 1,344 votes

    #6 - Episode 5

    Season 6 Episode 5 - Aired 2021-04-18

    AC-12 link Gail Vella’s murder with a historic case of police corruption, and Kate hatches a plan to tell once and for all if Jo is bent. They are closer than ever to cracking the case, but when Hastings’ authority is undermined it leaves his team in a potentially dangerous situation.

    Director: Jennie Darnell

    Writer: Jed Mercurio

  • Episode 5
    8.7/10 1,269 votes

    #7 - Episode 5

    Season 2 Episode 5 - Aired 2014-03-12

    Lindsay fights for her life as troubling details emerge of a vicious conspiracy involving corrupt police officers. With growing evidence of links between DCC Dryden and the ambush, Hastings is under pressure to arrest his senior officer.

    Director: Daniel Nettheim

    Writer: Jed Mercurio

  • Episode 1
    8.6/10 1,487 votes

    #8 - Episode 1

    Season 3 Episode 1 - Aired 2016-03-24

    Sergeant Danny Waldron and his armed response team shoot dead a hardened criminal.

    Director: Michael Keillor

    Writer: Jed Mercurio

  • Episode 3
    8.6/10 1,280 votes

    #9 - Episode 3

    Season 4 Episode 3 - Aired 2017-04-09

    As AC-12 wrestle with the new forensic evidence casting doubt over Tim Ifield, Kate is approached by another woman claiming to have been assaulted by Michael Farmer.

    Director: John Strickland

    Writer: Jed Mercurio

  • Episode 1
    8.5/10 1,537 votes

    #10 - Episode 1

    Season 2 Episode 1 - Aired 2014-02-12

    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

  • Episode 2
    8.5/10 1,346 votes

    #11 - Episode 2

    Season 2 Episode 2 - Aired 2014-02-19

    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

  • Episode 4
    8.5/10 1,225 votes

    #12 - Episode 4

    Season 4 Episode 4 - Aired 2017-04-16

    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

  • Episode 5
    8.5/10 1,186 votes

    #13 - Episode 5

    Season 4 Episode 5 - Aired 2017-04-23

    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

  • Episode 1
    8.5/10 1,436 votes

    #14 - Episode 1

    Season 5 Episode 1 - Aired 2019-03-31

    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

  • Episode 2
    8.5/10 1,205 votes

    #15 - Episode 2

    Season 5 Episode 2 - Aired 2019-04-07

    Kate and Steve attempt to track down a lead. A fresh police leak enables another audacious raid, while Steve’s attempts to gather information put him in a dangerous situation.

    Director: John Strickland

    Writer: Jed Mercurio

  • Episode 5
    8.5/10 1,130 votes

    #16 - Episode 5

    Season 5 Episode 5 - Aired 2019-04-28

    As the hunt for 'H' intensifies, Steve and Kate wonder if Hastings is guarding a dark secret.

    Director: Susan Tully

    Writer: Jed Mercurio

  • Episode 4
    8.4/10 1,255 votes

    #17 - Episode 4

    Season 2 Episode 4 - Aired 2014-03-05

    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

  • Episode 3
    8.4/10 1,231 votes

    #18 - Episode 3

    Season 3 Episode 3 - Aired 2016-04-07

    DS Steve Arnott believes there is a dark secret in Danny Waldron's past.

    Director: Michael Keillor

    Writer: Jed Mercurio

  • Episode 4
    8.4/10 1,238 votes

    #19 - Episode 4

    Season 3 Episode 4 - Aired 2016-04-14

    Fresh testimony launches AC-12 back on the trail of a corrupt officer.

    Director: John Strickland

    Writer: Jed Mercurio

  • Episode 1
    8.4/10 1,426 votes

    #20 - Episode 1

    Season 4 Episode 1 - Aired 2017-03-26

    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

  • Episode 3
    8.4/10 1,165 votes

    #21 - Episode 3

    Season 5 Episode 3 - Aired 2019-04-14

    Corbett's most daring plan yet requires McQueen to exploit links with corrupt police officers.

    Director: John Strickland

    Writer: Jed Mercurio

  • Episode 6
    8.4/10 1,351 votes

    #22 - Episode 6

    Season 5 Episode 6 - Aired 2019-05-05

    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

  • Episode 5
    8.3/10 1,563 votes

    #23 - Episode 5

    Season 1 Episode 5 - Aired 2012-07-24

    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

  • Episode 2
    8.3/10 1,253 votes

    #24 - Episode 2

    Season 3 Episode 2 - Aired 2016-03-31

    After the shooting at the drugs house, DC Fleming increases the pressure on Danny Waldron.

    Director: Michael Keillor

    Writer: Jed Mercurio

  • Episode 3
    8.3/10 1,074 votes

    #25 - Episode 3

    Season 6 Episode 3 - Aired 2021-04-04

    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