Creedon’s Atlas Of Ireland

6.30PM, RTÉ ONE ★★★★ The Lost Valley of Mayo is a remarkable corner of our island, with perhaps fewer dinosaurs than its name might suggest but with some breathtaking scenery and a history to boot. It was populated prior to the great famine, and now its place names are one of the few windows into its past. In this episode, John Creedon (pictured) explores the v alley, and makes the link between the importance of Irish place names and those of all indigenous cultures with Choctaw scholar Claire Young.