Episode 3

Kate Humble is in the Arctic where spring arrives with a bang. Helen Czerski chases a tornado to show how the earth's angle of tilt creates the most extreme weather on the planet.

13-10-2021

BBC 4

All episodes

Episode 2

Kate Humble and Dr Helen Czerski follow the Earth's voyage around the sun for one complete orbit, this time travelling from January to the March equinox.

12-10-2021

BBC 4

All episodes

Episode 1

11-10-2021

BBC 4

All episodes