Water is our most precious natural resource. There is not a plant or animal on earth that can do without it. Our landscape is shaped by it; livelihoods depend on it. Water provides homes for wildlife and is a source of inspiration and a place for recreation. In this programme, Helen is at Kielder Water in Northumberland, exploring the ways in which the wet stuff shapes our lives. There is also a meander through the archives, dipping a toe into previous watery worlds to which Countryfile has been.