With the search effort frustrated, Jackie reads the old book Father McKenna gave her telling of an ancient and horrifying prophecy. On the other side of the island, Twig questions Kai, while he makes preparations for battle. Content warning: this episode contains a depiction of suicide that some people may find disturbing.The Harrowing is written by Mark Healy and stars Joanne Froggatt as Sergeant Jackie O'Hara. Episode 5 also features:Alan Forbes - Stuart MartinMr Pryor - Adam JamesInspector Carey - Rosalind EleazarEwan MacFarlane - Jamie MichiePaul Rutherford - Blair KincaidMicky Brodsky - Tom CrowleyMaggie Webb - Hilary MacleanTwig - Sorcha GroundsellKai - Stewart ScudamoreDavey - Alex GraydonFather McKenna - Alec NewmanChild reading in church - Maya GraydonMajor Tanner - Regé-Jean PageOther roles were played by the castSound design is by Rich Evans and photography by Helen Murray. The executive producers are Robert Delamere and Sarah Doole and the series is produced by Ben Walk...