Meet the Line of Duty Series 6 Cast
Exactly Who's Returning For Series 6 of Line of Duty and the Newcomers Joining the Force
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Teale's character Philip Osborne has been on the show since series 1, when he was Chief Inspector and removed DS Arnott from the Counter Terrorism unit for refusing to take part in a cover up. At some point between series 3 and 6, Osborne was appointed Chief Constable of Central Police, the position he will hold in this newest series — not a great omen for Arnott and AC-12.