Orbit: Earth's Extraordinary Journey

In this first episode we travel from July to the December solstice. We experience spectacular weather and the largest tides on earth. To show how the earth's orbit affects our lives, Helen Czerski jumps out of an aeroplane and Kate Humble briefly becomes the fastest driver on earth.

In this second episode we travel from January to the March equinox. Kate Humble gets closer to the sun than she has ever been before, whilst Helen Czerski visits a place that gets some of the biggest and fastest snowstorms on earth.

In this final episode we complete our journey, travelling back from the March equinox to the end of June. Kate Humble is in the Arctic at a place where Spring arrives with a bang, whilst Helen Czerski chases a tornado to show how the earth's angle of tilt creates the most extreme weather on earth.