- 9.0/10(1.6k votes)
#1 - Episode 6
Loading...S4:E6While Nick Huntley faces lengthy questioning, AC-12 remain convinced of Roz's involvement.
0 CommentsView allDirector:John StricklandWriter:Jed Mercurio - 8.6/10(1.4k votes)
#2 - Episode 3
Loading...S4:E3As 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.
0 CommentsView allDirector:John StricklandWriter:Jed Mercurio - 8.5/10(1.3k votes)
#3 - Episode 4
Loading...S4:E4Roz'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.
0 CommentsView allDirector:John StricklandWriter:Jed Mercurio - 8.5/10(1.3k votes)
#4 - Episode 5
Loading...S4:E5DCI Roz Huntley struggles to allay her husband's suspicions. AC-12 find a new angle to pursue their case against her.
0 CommentsView allDirector:John StricklandWriter:Jed Mercurio - 8.4/10(1.5k votes)
#5 - Episode 1
Loading...S4:E1DCI Roz Huntley is under intense pressure from her superiors to apprehend a serial murderer after months of fruitless investigation.
0 CommentsView allDirector:Jed MercurioWriter:Jed Mercurio - 8.1/10(1.3k votes)
#6 - Episode 2
Loading...S4:E2AC-12 crank up their investigation into Operation Trapdoor. Kate makes progress in her undercover role.
0 CommentsView allDirector:Jed MercurioWriter:Jed Mercurio


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!
A drama about the investigations of AC-12, a controversial police anticorruption unit.
Episodes
6
Avg. Rating
8.5
S1
S2
S3
S4
E1
E2
E3
8.4
8.1
8.6
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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 1556 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".