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Episode 1

Episode number: 1

Overview: DCI Roz Huntley is under intense pressure from her superiors to apprehend a serial murderer after months of fruitless investigation.

Episode 2

Episode number: 2

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

Episode 3

Episode number: 3

Overview: 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.

Episode 4

Episode number: 4

Overview: 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.

Episode 5

Episode number: 5

Overview: DCI Roz Huntley struggles to allay her husband's suspicions. AC-12 find a new angle to pursue their case against her.

Episode 6

Episode number: 6

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