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 Martin

Mr Pryor - Adam James

Inspector Carey - Rosalind Eleazar

Ewan MacFarlane - Jamie Michie

Paul Rutherford - Blair Kincaid

Micky Brodsky - Tom Crowley

Maggie Webb - Hilary Maclean

Twig - Sorcha Groundsell

Kai - Stewart Scudamore

Davey - Alex Graydon

Father McKenna - Alec Newman

Child reading in church - Maya Graydon

Major Tanner - Regé-Jean Page

Other roles were played by the cast

Sound 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 Walker for Storyglass.

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