There is plenty of food in the Pacific Ocean, but it is the challenge of finding that food that drives all life in the Pacific. In the voracious Pacific we meet a destructive army of mouths, a killer with a hundred mouths and the biggest mouth in the ocean.
Explore a corner of Namibia dominated by stifling heat and parched sand, where a desolate landscape of haunting beauty lies. While most of Etosha National Park is devoid of growth, its margins are dotted with a series of oases that attract herds of thirsty creatures: antelopes, exotic birds, and the world's biggest elephants.
The fifth programme explores the alliances formed between the animal and plant worlds. It examines the ways in which plants live together and rely on each other. Whether living together in harmony, relying on each other for homes, protection or food, or living off each other, by strangling or otherwise destroying each other in a bid to survive.