As he strolls along the coast of Northumberland, an archaeologist points out where you can still see the signs of a tsunami which played a part in the separation of mainland Britain from Europe. Meanwhile, a cross-channel swimmer, a keen bird watcher, and an environmental artist reveal their own very personal connections with the landscape of the sea. From the beauty and mental healing we gain from the sea to the pollution we cause in it, these are stories of revelation, respect, fear, horror, unknowing, wonder and inspiration. Presenter Helen Mark, Producer Sarah Blunt.