Tony and the Team get a unique opportunity to dig at an army firing range at High Ham in Somerset, and investigate a series of mosaics first discovered 150 years ago. The mosaics hint at a grand villa but as this part of Somerset has been in constant use by the army for the last century and a half, no one has ever had a chance to really see what's under the ground. To everyone's surprise the initial results suggest there's been more than one villa on this site. Over the following days a story emerges of the highs and lows of Roman life in Britain, from the grand rooms used for entertaining to the pitiful lives of the slaves who lived on the edge of this high society. The archaeology is impressive but the weather's not, and as the temperatures plummet the Team hold a crisis meeting. Could this be the first time in the programme's history that the conditions force the diggers to down tools?