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Harry Treadaway can next be seen in season four of the Netflix series The Crown. Before that he starred opposite Brendan Gleeson in David E. Kelley's series, Mr. Mercedes for two seasons. On the big screen, Treadaway was last seen in Nash Edgerton's film, Gringo, opposite Joel Edgerton, Charlize Theron, and David Oyelowo. Previous notable credits include three seasons on the Showtime series, Penny Dreadful and the Disney feature, The Lone Ranger.