Patrick Aryee tracks down great white sharks, desert giraffes and one of the last 'tusker' elephants as he explores the challenges facing nature's giants.

Patrick Aryee gets eye to eye with Komodo dragons, orangutans and giant pandas as he explores why these creatures all came to be supersized.

Patrick Aryee begins in the Americas, finding out more about the sperm whale, coming face to face with grizzly bears and getting up close and personal with an anaconda.