The Time team travel to Codnor Castle in Derbyshire to try and piece together the history of the castle that is nearly a 1000 years old. Among a series of wonderful discoveries they find something in the moat that takes everyone's breath away.
Eaglesfield Park was a site for tethering barrage balloons during WW2. There were also stop line defenses to explain. The team dig 'modern' remains and try to understand there findings. They also meet local home guard veterans.
Francis Popham started building a grand mansion in Georgian times. Only the lodge remains. Finding buried walls shows the outline of the now demolished building. Parts were reused in 1830s at Prior Park in Bath.
A former military compound is between reverting back to a council open space. From illustrations there was a castle here. But where? The adjacent communication mast does not help geophys, nor does military grade concrete covering.