Furniture maker Jamie Brown has big ideas about turning a colossal and historic 15,000 square foot RAF bunker from World War II into his new home. However, with the Nottinghamshire bunker totally encased in earth, with no natural light, and the back section submerged in water, Jamie's wife, who is about to have their first baby, isn't so sure. With its fascinating history and jaw-dropping engineering, George helps Jamie tackle this huge undertaking and discovers the important role it played in the blitz.