As the investigation draws to a close, Tosh and Calder try to unravel the mystery at the heart of the Bains. The identity of the killer lies in the reason why Ellen left Shetland.
Quest roles:
Tibu Fortes(Harry Lamont), Jakub Bednarczyk(Rory Quinn), Dawn Steele(Stella Quinn), Barry O'Connor(Kieran Quinn), Phyllis Logan(Grace Bain), Russ Bain(Bobby Bain), Steven Miller(Reverend Alan Calder), Kevan MacKenzie(James Innes), Bamshad Abedi-Amin(Azir Sadat), Nina Toussaint-White(Amma Calder), Dylan Blore(Tom Knox), Jennifer Black(Jean Ferguson), Maisie Norma Seaton(Ellen Quinn)