Line of Duty returned to TV screens last week for the sixth season, with a brand new guest star. Kelly Macdonald, who has appeared in Boardwalk Empire, No Country for Old Men and Trainspotting, is the newest member of the cast.Kelly, who was born in Glasgow, plays DCI Joanne Davidson.She stars opposite regular cast members Vicky McClure as DI Kate Fleming, Adrian Dunbar as Superintendent Ted Hastings and Martin Compston as DS Steve Arnott.Fans of the latter will know that he is also from Scotland.Martin grew up in Greenock, in the west central Lowlands of Scotland, but plays an English detective.Kelly said that the show’s creator thought her accent might make Martin slip up during the season six readthrough.“Oh my God!
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