Bringing an air of world-weary dignity to his role, Martin Shaw (Judge John Deed, The Professionals) returns as Inspector George Gently, a former Scotland Yard sleuth now tracking murderers in Britain’s North Country. Far from London, these once-quiet counties are just beginning to feel the social and political changes of the 1960s. The menacing crimes test even Gently’s big-city experience and hard-won wisdom. And his impulsive young protégé, Sergeant John Bacchus (Lee Ingleby, Nicholas Nickleby), tests ne…