Shetland returns for a new thrilling six-part tale with Douglas Henshall reprising his role as DI Jimmy Perez alongside series favourites Alison O’Donnell, Steven Robertson, Mark Bonnar, Erin Armstrong, Anne Kidd and Lewis Howden.　　Series 6 centres on the doorstep murder of a prominent local figure, a case which strikes at the heart of the Shetland Isles and its people. As Perez and his team uncover a kaleidoscope of motives for the murder, their investigation soon takes a shockingly sinister turn.…