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Line of Duty Series 4 Episodes

    Episode 6

    6/6 While Nick Huntley faces lengthy questioning, AC-12 remain convinced of Roz's involvement.

    Episode 5

    5/6 Roz struggles to allay her husband's suspicions. AC-12 find a new angle to pursue.

    Episode 4

    4/6 Roz's husband Nick is brought in for questioning by AC-12.

    Episode 3

    3/6 AC-12 wrestle with the new forensic evidence.

    Episode 2

    2/6 AC-12 crank up their investigation into Operation Trapdoor.

    Episode 1

    1/6 DCI Roz Huntley is under intense pressure from her superiors to apprehend a murderer.