8.4/101,484 votes8.4/10(1,484)#1 - 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
8.1/101,253 votes8.1/10(1,253)#2 - 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
8.6/101,337 votes8.6/10(1,337)#3 - Episode 3
Season 4 Episode 3
Aired 4/9/2017
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
8.5/101,279 votes8.5/10(1,279)#4 - 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
8.5/101,239 votes8.5/10(1,239)#5 - 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
9.0/101,535 votes9.0/10(1,535)#6 - Episode 6
Season 4 Episode 6
Aired 4/30/2017
While Nick Huntley faces lengthy questioning, AC-12 remain convinced of Roz's involvement.
Director: John Strickland
Writer: Jed Mercurio
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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!
A drama about the investigations of AC-12, a controversial police anticorruption unit.
Genres:CrimeDramaMystery
Episodes
6
Avg. Rating
8.5
S1
S2
S3
S4
E1
E2
E3
8.4
8.1
8.6
Season 4 Ratings Summary
"Episode 1" is the best rated episode of "Line of Duty" season 4. It scored 8.4/10 based on 1484 votes. Directed by Jed Mercurio and written by Jed Mercurio, it aired on 3/26/2017. This episode is rated 0.3 points higher than the second-best, "Episode 2".
