Line of Duty's Gregory Piper was almost replaced as Ryan Pilkington
Line of Duty's Gregory Piper was almost replaced as Ryan Pilkington Joe Anderton © World Productions / Steffan Hill - BBC Line of Duty star Gregory Piper was almost replaced as Ryan Pilkington when he was re-introduced in series 5. Line of Duty series 6 may have ended with an anti-climactic revelation of who 'H' was in the eyes of fans, but the series gave us a villain we love to hate for most of the episodes in the form of Ryan Pilkington. Introduced in series 1 as a young boy working for the OCG, Ryan returned in series 5 even further embedded in the plan and brutally mur...