The Team face one of their strangest challenges ever: digging through a church graveyard in search of what could be one of the largest Roman structures ever built in Britain. Tony Robinson and his band are here at the request of the Reverend William Burke, vicar of the historic St Kyneburgha's church in Castor, Cambridgeshire. Under very close supervision, the Team must dodge the thousands of burials in the graveyard to get to an ornate mosaic floor that was reportedly discovered almost 200 years ago. It could be the missing link in a village that is crammed with massive Roman walls and old reports of exquisite finds.