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The Best Episodes of Line of Duty Season 4

Every episode of Line of Duty Season 4 ranked from best to worst. Discover the Best Episodes of Line of Duty Season 4!

Binge this in 5h 54m•Peaking at 9.0/10

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

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Episode Rankings

  1. #1 Fan Favorite
    Line of Duty Season 4 Episode 6 - Episode 6
    9.0/10(1717 votes)

    S4:E6

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

    Director:John Strickland
    Writer:Jed Mercurio

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  2. Line of Duty Season 4 Episode 3 - Episode 3
    8.6/10(1505 votes)

    S4:E3

    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

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  3. Line of Duty Season 4 Episode 4 - Episode 4
    8.5/10(1455 votes)

    S4:E4

    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

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  4. Line of Duty Season 4 Episode 5 - Episode 5
    8.5/10(1405 votes)

    S4:E5

    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

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  5. Line of Duty Season 4 Episode 1 - Episode 1
    8.4/10(1676 votes)

    S4:E1

    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

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  6. Line of Duty Season 4 Episode 2 - Episode 2
    8.1/10(1422 votes)

    S4:E2

    AC-12 crank up their investigation into Operation Trapdoor. Kate makes progress in her undercover role.

    Director:Jed Mercurio
    Writer:Jed Mercurio

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    The 20 BEST Episodes of Line of Duty

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Season 4 Ratings Summary

"Episode 6" is the best rated episode of "Line of Duty" season 4. It scored 9/10 based on 1717 votes. Directed by John Strickland and written by Jed Mercurio, it aired on 4/30/2017. This episode is rated 0.4 points higher than the second-best, "Episode 3".