The arrival of a military rescue team on Good Friday buoys the islanders. Jackie joins Major Tanner and his troops as they set out across the inhospitable landscape to track down Kai and rescue his captive, Twig.
The Harrowing is written by Mark Healy and stars Joanne Froggatt as Sergeant Jackie O'Hara. Episode 6 also features:
Ewan MacFarlane / Raven - Jamie Michie
Micky Brodsky / Raven - Tom Crowley
Maggie Webb / Raven - Hilary Maclean
Paul Rutherford / Raven - Blair Kincaid
Major Tanner - Regé-Jean Page
Raven - Scarlett Maltman
Inspector Carey - Rosalind Eleazar
Mr Pryor - Adam James
Kai - Stewart Scudamore
Twig - Sorcha Groundsell
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.