The great flood in the Okavango turns 4,000 square miles of arid plains into a beautiful wetland. Elephant mothers guide their families on an epic trek across the harsh Kalahari Desert towards it, siphoning fresh water from stagnant pools and facing hungry lions. Hippos battle for territory, as the magical water draws in thousands of buffalo and birds, and vast clouds of dragonflies. Will the young elephant calves survive to reach this grassland paradise? The experienced mother elephants time their arrival at the delta to coincide with the lush grass produced by the great flood.
In a TV first, the programme shows the way they use their trunks to siphon clean water from the surface layers of a stagnant pool, while avoiding stirring up the muddy sediment on the bottom with their feet. Lechwe swamp deer, zebras, giraffes, crocodiles and numerous fish and thousands of birds arrive in the delta. And, in a phenomenon never before filmed in the Okavango, thousands of dragonflies appear - seemingly from nowhere - within minutes of the flood arrival, mating and laying eggs. As the flood finally reaches its peak, elephants and buffalo, near the end of their epic trek across the desert, face the final gauntlet of a hungry pride of lions. In a heart-wrenching sequence, a baby elephant is brought down by a lion in broad daylight.

The last episode of the series showcases Africa, home to the greatest wildlife gatherings on earth and vast ecosystems. It delves into the lives of intelligent chimpanzees using tools in Ivory Coast, and the diverse cichlid fish in the Great Rift Valley's lakes. The film also explores the survival strategies of animals in the Namib Desert, including the brown hyena and the aardvark.
But even in this land of plenty, wildlife faces huge challenges. Crucially, it is addressed the impact of climate change and human activities, highlighting the plight of endangered species like the northern white rhinoceros and the decreasing populations of elephants and cheetahs due to poaching. However, it also offers hope, illustrating successful conservation efforts like the recovery of the mountain gorilla population in Virunga National Park.
The documentary is a vivid reminder of the richness of African wildlife and the urgent need for conservation efforts to preserve our planet's biodiversity.

Africa's wildest river is home to the most spectacular wildlife. Hippos fight for territory while herds of elephant, water buffalo and zebra depend on it for life. In the wet season the rains burst the riverbanks and everyone, including people, must move whilst fish swim through the villages. In the dry season the creatures fight over the few pools of water while predators prowl. At its heart it plunges over Victoria Falls and into wild ravines before draining into the Indian Ocean, where storm clouds cycle the water back into the heart of Africa.