2. Spring

As the North starts to face the sun, the great melt begins, and there's a baby boom. But for penguins and foxes in the South, conditions are getting harsher.

3. Summer

Summer can be extreme. In The Rockies, summers are short. Pika must harvest flowers to eat before the snow returns. For Marion Island’s king penguin chicks, life has frozen still.

4. Autumn

Autumn signals change. For many, change brings opportunity, but also huge challenges. For some, like Monarch butterflies, it offers a chance to begin again or take a new path.

5. Full Circle

See the incredible strategies animals like red squirrels, pikas and penguins use to cope with their changing worlds, as we journey through the seasons, in our orbit around the sun.

6. A Year on My Planet Earth

These are the stories of the scientists and conservationists who have have used pioneering techniques to uncover new behaviour, enabling us to film this extraordinary series.