Cormac surveys forgotten homes of World War One veterans in Fermanagh, explores the now-empty Armagh Gaol, and visits an ancient castle in Cavan. Architect Ciarán Mackel looks at the transformation of the former Ebrington Barracks in Derry City.

Cormac finds out about the abandoned village of Glentornan in County Donegal. In Belfast, he hears about the heyday of the now-dilapidated Templemore Baths. And Ciarán Mackel visits a school regeneration in west Belfast.

Cormac visits an abandoned railway station in the Glens, a derelict mill in County Down and a deserted lighthouse off the Larne coast, while Ciarán Mackel examines the future of the storied Riddel's Warehouse in Belfast.