Line of Duty

Series 4

TV-MA

100%94%

The fourth series sees AC-12 facing their most devious opponent yet! Under pressure from her superiors, DCI Roz Huntley charges a young man with a series of murders after months of fruitless investigation, but is he guilty? The Chief Forensic Investigator has doubts and turns to AC-12.

6 Episodes

In the Shadow of the Truth
E1
In the Shadow of the TruthDCI Roz Huntley is under intense pressure from her superiors to apprehend a serial murderer after months of fruitless investigation.
Who Sows the Wind
E2
Who Sows the WindA dismembered body is discovered, and worries grow when Roz fails to report for duty. After further questioning of Michael Farmer unearths crucial new information, AC-12 challenge the case against him.
In the Trap
E3
In the TrapAs 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.
Moral Superiority
E4
Moral SuperiorityRoz'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.
Lying Nest
E5
Lying NestDCI Roz Huntley struggles to allay her husband's suspicions. AC-12 find a new angle to pursue their case against her.
Royal Hunting Ground
E6
Royal Hunting GroundWhile Nick Huntley faces lengthy questioning, AC-12 remain convinced of Roz's involvement.