Why Douglas Henshall quit Shetland and rumoured return as new series starts

Popular BBC crime drama Shetland returns for its 11th series on Thursday eveningShetland: Douglas Henshall stars in season seven trailerShetland is back for a new and exciting series, which will mark Alison O’Donnell’s last outing as DI Alison ‘Tosh’ McIntosh.First broadcast on BBC One back in 2013, the series is based on the novels of Ann Cleeves and adapted by David Kane.