Three miles east of Stonehenge, archaeologists Phil Harding and Alice Roberts investigate two newly detected neolithic henges, using geophysical survey and excavation footage to work out whether the earthworks were built and used at the same time as their famous neighbor. Roberts anchors this episode of Digging for Britain, the series that follows British excavation teams through a season of digs, and the double henge segment sits alongside a run of other finds packed into this compilation: WWI practice trenches, a Celtic coin hoard, a Dark Age palace and burial at Merlin's Cave, a Roman siege site, a plague pit, Stone Age artificial islands, Lindisfarne monastery, Iron Age brochs, the Must Farm settlement, the Battle of Barnet battlefield, Anglo-Saxon bed burials, Shakespeare's Curtain Playhouse, and the Watlington hoard. Each segment follows specialists on site as they excavate, date finds, and argue over what the evidence means, with Roberts narrating the connective thread between digs. The henge mystery itself is left open, hinging on further dating evidence archaeologists have not yet obtained.