Paul explores the River Annan in Dumfries and Galloway, following it from where it rises above the Devil's Beef Tub all the way to the Solway Firth. On the way, he samples some dubious-smelling spa water.

The North Esk, south of Edinburgh, is a hidden gem. Paul follows it from the Pentland Hills through a landscape steeped in myth and legend. From the picturesque and delightful Habbie's Howe, he reaches Roslin Glen.

Paul follows the River Teviot through Teviotdale, once the haunt of notorious border reivers; in the town of Hawick, Paul joins the annual Common Riding, an event that recalls the border wars with England.