William's journey starts in outback New South Wales. Richard Kingsford, also known as Dr Duck squeezes the larger-than-life actor into his small plane and shows him how to count water birds from up high.
In this century the world's population will grow dramatically older. The second episode takes us into the lives of people across the world already impacted by the inevitable march of global ageing. In China we reveal the plight of the elderly in the countryside, who've been left to fend for themselves as families shrink.