4/5. Geography series with Dr Iain Stewart. Iain travels to surfers' paradise Hawaii to learn more about oceans, explaining the difference between waves, tides and currents. Also in HD. [S,AD]
2/5. Dr Iain Stewart reveals the natural forces that shaped the earth. He traces the history of the atmosphere, from the ozone layer's creation to its current destruction. Also in HD. [S,AD]
1/5. Documentary series. Dr Iain Stewart tells the story of planet Earth. Although they appear to be destructive, volcanoes have been crucial to the development of life. Also in HD. [S,AD]