Plot: Richard takes the wheel of Ford Zodiac to drive the circular route from Caernarfon that loops through some of Snowdonia's most sensational scenery. He gets a Welsh lesson at Caernarfon Castle, learns the significance of the Dinorwic slate quarry, drives the Llanberis Pass, meets 71-year-old human fly Eric Jones and takes a trip down memory lane at a former Butlins holiday camp