Calder initially reels from the awful news, but quickly becomes suspicious. Tosh worries Harry and Donnie with her pursuit of a controversial new theory.
Quest roles:
Anne Kidd(Cora McLean), Conor McCarry(PC Alex Grant), Angus Miller(Donnie), Karl Collins(DCI Thomas Coombes), Tibu Fortes(Harry Lamont), Lorraine McIntosh(Heather Bain), Jakub Bednarczyk(Rory Quinn), Dawn Steele(Stella Quinn), Barry O'Connor(Kieran Quinn), Phyllis Logan(Grace Bain), Russ Bain(Bobby Bain), Neil Pendleton(Neil Bain), Jamie Sives(Cal Innes), Steven Miller(Reverend Alan Calder), Kevan MacKenzie(James Innes), Bamshad Abedi-Amin(Azir Sadat), Manjinder Virk(Farida Sadat), Rosie Graham(Young Calder), Gregor Milne(Young Cal)