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.  The Time Team head to the town of Castor to dig in the grounds of a Church looking for remains of a substantial Roman complex. Complicating the excavation is the work of Edmund Artist who took detailed measurements and dug the area 150 years ago. They need to first find the ruins, and try and understand and confirm what Artist saw.