On the Tweed, Jeremy tries to shear Cheviot sheep, tags osprey chicks, visits Merlin's grave, investigates the famous border ballads, and tracks down the People's Front for the Liberation of Berwick
Jeremy travels the Severn through the heartlands of England and Wales. He meets the last mudhorse fisherman on the Severn Sea and investigates the country's largest ship graveyard.
Jeremy explores the Mersey's role in creating modern industry, discovers how it has recovered from pollution, scales its tallest bridge, goes trout fishing and tracks down the Mersey mermaids
Jeremy travels from the Thames's elusive source in Gloucestershire to its bleak but epic end in the Kent and Essex marshes. In spite of its fame, there's a lot to the Thames that people don't know. It's always been a working river, where people from Domesday millers to Victorian cockneys and modern engineers have made their living. So Jeremy meets the people who manage the floods, maintain the bridges, control the locks and deal with the sewage, with the odd stop along the way for entertainment.