Earthwork remains of a fort from the days of Henry VIII; the remains of a German U-boat; Thames sailing barges sunk in estuary mud.

Tori and the team discover how the Dorset coastline played a vital role in D-Day; reveal the story of the world's first aircraft carriers; search for a huge Iron Age monument that can only be seen, sometimes, for a few hours a year.

Along Glasgow's River Clyde, Tori finds a strange vessel that played an instrumental part in creating the city; Tori examines a wooden structure that gives a tantalizing glimpse into what life was like there 2,000 years ago.