2. Villas out of Molehills - Withington, Gloucestershire

When a colony of moles brings up pieces of mosaic floor in a Cotswold field, Tony Robinson and the team investigate whether the findings could be linked to a nearby Roman villa discovered almost 200 years ago. A local spring might give a clue to the true purpose of the building. The team are joined by local archaeologist Roger Box, and Roman specialists David Neal and Richard Reece.