"Life is too cynical," wrote Paul Weller in the Jam's Tales from the Riverbank, yearning to return to the pastel fields of his youth, both life and death "carried in this stream". The same romanticism, that dream of Arcady, powers this meditative, even transcendent series, which tonight finds Lance and Andy attempting, "like environmental ninjas", to save a beloved tree from culling. The penultimate episode of a show that yields hidden treasures galore.