Line of Duty fans were left gobsmacked on Sunday's episode of Line of Duty as character Ryan Pilkington made his return.Ryan came face-to-face with DI Fleming as he was called in to replace Farida Jatri after she asked to switch departments.Viewers were first re-introduced to Ryan as a police officer as he gave DCI Davidson (Kelly Macdonald) and DI Fleming an update on the crime scene of where Carl Banks's body was found.He told Davidson: "Good news mam, the search team has found a knife."DI Davidson then introduced Kate Fleming and Ryan, telling Kate Ryan was Farida's replacement.As Kate and Davidson walked away from Ryan, Kate shot a look back at him, appearing to recognise him.She later asked him at the police station if they'd "worked.
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