3: The Thin Blue Line | Wonders of the Solar System
Professor Brian Cox reveals how something as flimsy as an envelope of gas - an atmosphere - can create some of the most wondrous sights in the solar system.
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8: Coasts | The Blue Planet
David Attenborough narrates a natural history of the oceans, examining how animals from in and around the sea use the constantly changing coastal areas.
7: Tidal Seas | The Blue Planet
David Attenborough narrates a natural history of the oceans. As snails surf the waves in pursuit of a meal, how do the tides create opportunities for marine life?