7/8. Rivers - Friend and Foe: Rivers provide food and water, but they can also flood or freeze. Human Planet meets people for whom rivers can be both a risk to life and a lifeline. Also in HD. [AD,S]
6/8. Grasslands - Roots of Power: Documentary featuring the remarkable people who live in the world's grasslands, exploring their relationship with the natural world around them. Also in HD. [AD,S]
3/8. Arctic - Life in the Deep Freeze: The remarkable stories of some of the extraordinary people who make their homes in the Arctic, the harshest environment on Earth. Also in HD. [AD,S]
1/8. Oceans - Into the Blue: Documentary about how humans exploit the sea's riches with great ingenuity and bravery. Contains some upsetting scenes. Also in HD. [AD,S]