The documentary exploring wildlife and plants throughout the year continues with a look at how the natural world reacts to the arrival of summer. Andrew Scott narrates.
The arrival of autumn sees chipmunks and beavers stash their winter supplies, animals from musk oxen to beetles battling for mates and gannet chicks facing life's first challenges.
The arrival of winter, exploring how animals and plants rise to the challenges the coldest season brings. Narrated by Andrew Scott. Last in the series.