(Producer) Episode 10: From the evergreen forests of the frozen North to the deciduous dry forests of the tropics, these woodlands illustrate the intense seasonality of the EArt. The tallest, largest and oldest organisms on the planet, they are home to a fascinating range of wildlife ; Episode 11: Feast of famine -- it's the governing principle of ocean life. From the sailfish, three-meter-long, rapier-billed predators, and the exquisitely shelled Nautilus to the threatened blue wale, this journey into the most unexplored part of the planet reveals the extraordinary survivors of this immense and barren realm.

"Episodes 10-11."

Seasonal forests -- Ocean deep.