null: Best-selling Author Sir Terry Pratchett, diagnosed with Alzheimer's five years ago, returns to the jungles of Borneo after 18 years to visit the orangutans and discover a new threat to their habitat that could push them to the brink of extinction. He contemplates the role mankind is playing in the eradication of the planet's species, and considers his own inevitable extinction. Please note, this version may differ slightly from the UK TX version.