Deep in the rainforest of Central Africa lies an elephant oasis - a remarkable place that holds the key to the future for Forest Elephants. Over the last 20 years, Andrea Turkalo has been studying these enigmatic giants, getting to know over 4,000 intimately. She has begun to unravel the secrets of their complex social lives and the meanings of their unique vocalisations. New acoustic research is shedding light on the many mysteries that still surround forest elephant society. Will these endangered elephants finally speak out and tell Andrea what it is they need to survive?

In the 1960s, 'Born Free' captured the world's imagination with the story of Elsa, an orphaned lioness who was taken in by George and Joy Adamson and returned to a life in the wild. The book and film sparked a new love of nature that has blossomed ever since, but the true story of what happened afterwards was far more tragic as both George and Joy were murdered.

Fifty years on, this emotional and revealing drama documentary re-lives those events - with intimate contributions from Virginia McKenna and David Attenborough.