Exhausted by her own demons, battling anyone else's is the last thing Merrily wants to do. However, she must gather her wits and take strength from her mentor Huw Owen as she puts the final pieces of the jigsaw into place. As the investigation reaches its conclusion, Merrily realises she needs to steel herself and summon the energy to fight evil in order to save her daughter's soul.
Elenco: Anna Maxwell Martin , David Threlfall , Ben Bailey Smith , Siobhan Finneran , Leila Mimmack , Sally Messham , David Sterne .