In the NEW SEASON 4 of Waterways through Time, historian Turtle Bunbury explores Ireland's rivers, lakes, and canals through conversations with remarkable voices. Historian Rob Goodbody explains how our waterways were first mapped. Brian Cassells tells the story of the Ulster Canal and its modern revival. Liam Kenny shares the lore and legends of Kildare's towpaths. Admiral Michael Clarke recalls the yachting traditions of Lough Erne and its role in World War Two. John and Sandra Lefroy invite us aboard the Phoenix at Killaloe. Military historian Dr Harman Murtagh reflects on war and settlement along the waterways. And sailing historian Vincent Delany charts the story of the Shannon One Design.