Chris Packham and Kate Humble are in Pembrokeshire, south Wales, to find out how our marine wildlife is faring this autumn. Seasonal storms stir up a rich mix in our seas and it's at the coast where you can witness the results, whether it's by looking in a rock pool or simply combing the beach. Simon King is in Senegal, west Africa, on the trail of arguably Britain's most spectacular summer visitor - the osprey. These migratory raptors fly south for the winter in search of the world's best fishing grounds. Gordon Buchanan is on the trail of another viewer's story and Martin Hughes-Games reveals how to get more involved with the wildlife and the series.