Time Team have never excavated a watermill before. Despite the fact that they were plentiful in historic times, these features have been under-researched. Heading to the River Otter in Devon, the team excavate a site dating back at least to the Domesday Book of 1086, yet the last mill building on the site was pulled down as recently as the 1960s. They are joined by Martin Watts (mill historian), industrial archaeologist Mike Nevell, and Finds specialist John Allan. Tony visits the working mill at nearby Otterton.