Matt and Charlotte visit the world-famous Hadrian's Wall as it celebrates its astonishing 1900th anniversary to uncover some hidden histories of the area.Charlotte makes an amazing discovery at the Roman fort of Vindolanda, an archaeological excavation site where they are unearthing the lives of women and children of our past, and meets the chemist trying to chart the changes beneath the surface. Matt finds out about the rich multicultural history of the soldiers that manned the wall - from Syrian archers to Iraqi bargemen on the Tyne - and meets the artist who's brightly coloured art installation has brought a Roman fort's history to life.Meanwhile, Adam is also in Northumberland, learning how one farming family is turbo-charging birds, and Tom Heap investigates why the aging, government-owned Scottish island ferry service is leaving locals feeling cast adrift.