This series explores an unusual theme: the study of animals ageing in the wild. We examine the creatures living on the dividing line between life and death. Passionate researchers bring us right into the lives of the animals they study: their ancestors and children, their friends, their struggles and successes. But this isn’t just another animal documentary full of beautiful photography, it is also an invitation to take an in-depth look at what your autumn years are like, when you live in the wild. This requires long-term studies, and our researchers guide our trip around the world and bring us into the lives of these wild elders. Their explanations form part of a fascinating narrative, revealing that the process of ageing in animals varies as much as the species themselves. It is impossible not to see this without reflecting on our own experiences along the way.