David Attenborough examines the ecological and conservation crises that threaten the world

A simple, carved figure bought at an auction in New York leads David Attenborough on a global journey from Russia to Australia, from England back to the Pacific. On the way he delves into a history of the stunning stones on Easter Island.

Paul Merton goes in search of the origins of screen comedy in the forgotten world of silent cinema - not in Hollywood, but closer to home in pre-1914 Britain and France. Revealing the unknown stars and lost masterpieces, he brings to life the pioneering techniques and optical inventiveness of the virtuosos who mastered a new art form. With a playful eye and comic sense of timing, Merton combines ...

David Attenborough examines the ecological and conservation crises that threaten the world