Richards looks at how the discovery of the remains of an ancient trackway in the fenlands of Lincolnshire has thrown new light on the rituals of the Iron Age. Made of wooden posts some five metres long, the track ran over marshy ground to the open water and was no ordinary thoroughfare. This was a place were the Celts went to worship their deities.

Richards investigates the discovery of a grave containing the body of tallest Iron Age woman ever found in Britain and a dismantled chariot, a find which caused great excitement and speculation among archaeologists. Initial theories suggested the woman must have been a Celtic princess, but the realisation that the carriage was intended for battle led experts to conclude they must be the remains of a warrior queen similar to the celebrated Boudicca.

Richards pieces together the story of life on the World War I front line as amateur archaeologists unearth a complex system of trenches, an exceptional array of military hardware and an astonishing collection of personal artefacts either forgotten or discarded at the end of the conflict.

Richards and the team visit an archaeological site where the bodies of 47 babies and children were recently excavated. The discovery that the youngsters died from malaria has given rise to the theory that the fall of one of history's greatest empires was in part due to an epidemic : so when a fleet of Roman cargo ships are discovered deliberately sunk in mysterious circumstances at a site in Sardinia, the experts arrive hoping to find conclusive evidence.