Helen Mark takes to the sea to find out how the perilous conditions of the north Devon coastline have affected life there from prehistory to the present day. She tours Baggy Point with National Trust archaeologist Shirley Blaylock in search of the first coastal dwellers, attempts the perilous crossing to Lundy Island and crosses the Cornish border to hear the story of Parson Hawker, the eccentric vicar of Morwenstow and purported scourge of the wreckers. This is the last in the present series. 'Open Country' returns on the 4th of July with a look at the alternative energy revolution in Orkney.