Steve heads to the Moukalaba Doudou National Park in Gabon - he wants to discover whether this unexplored rainforest could be home to an undiscovered population of chimpanzees.

Steve takes on four entirely new adventures to some of the most remote parts of the planet, including Saudi Arabia, Gabon and Mexico, in search of precious natural wonders. He unearths secrets of an ancient civilisation and discovers wildlife more at risk than ever before.