Unfinished Business

While working on Ventress's new house, Greengrass and David uncover an unexploded bomb from WWII, and worse still, Greengrass is trapped beside it. As the whole of Aidensfield is evacuated and the army descend on the village, an emotional Greengrass makes a shock confession to Ventress about his past, and Nick's search for a missing boy leads to the discovery of a dead body in a Railway station master's house.