Time Team officially returns for its first brand new episodes in a decade. New presenters Dr Gus Casely-Hayford and Natalie Haynes join team members old and new to investigate 2 new dig sites.  Series 21 (Season 21) of Time Team follows two new digs, each released in extended 3-part episodes exclusively on the Time Team Official YouTube channel. The first dig explores a mysterious Iron Age site in Cornwall; the second investigates a huge Roman villa on the estate of a Tudor castle in Oxfordshire.