follows Rick Edwards as he ventures inside some of the UK's most spectacular and endangered castles. From crumbling medieval towers to collapsing royal chambers, engineers and historians battle to stabilise these epic structures with help from National Lottery funding. Each rescue unlocks extraordinary stories of warrior kings, civil wars, brutal betrayals and forgotten lives. Across each episode, Rick meets heritage experts, engineers and stonemasons racing to save these buildings. Blending cutting-edge engineering, adventure and vivid historical reconstruction, the series reveals how these fortresses shaped Britain, and whether they can survive for future generations. Castles featured are Fyvie, Gwyrch and Lowther.