Overview: An aerial survey of a Worcestershire field has revealed cropmarks leading to substantial Bronze Age finds. But Iron Age remains also exist. Time Team tries to sort it out. Local schoolchildren help with a bit of fieldwalking; and Mick shows how cropmarks and posthole marks become visible in fields. Francis Pryor explains the difference between Bronze Age and Iron Age and describes life in a roundhouse. Also joining the team are archaeologist Malcolm Atkin and environmentalist Liz Pearson; while wood specialist Guy Apter gets the kids to help make a Bronze Age ard (plough).