After the murder of one of its own, the Makulu Pack of wild dogs looks to a new leader for salvation; the Western Pride is exiled to the fringes of the kingdom as it fights to protect its cubs; the marauding hyena clan commits the cruelest of acts.
Spy Pup is immersed in wild dog life to explore their maternal love, and Spy Penguin records the turbulent action of the mating season, as a male Adelie penguin falls victim to a pebble thief that ruins his chances of love for the season. Spy Tortoise and Spy Bushbaby keep watch on chimpanzees, while in perhaps the most moving scenes; Spy Monkey becomes the focus of attention for a troop of concerned langurs who believe the motionless camera-creature has died.
Across the dunes of the Kalahari, a towering, 200-year-old tree extends its branches to the heavens. This camel thorn Acacia is a secret refuge for those in the know. Colonies of sociable weavers use its branches for their oversized nests. Oryx, kudu, and other herbivores feed on her ripened pods, helping soften the seeds for germination. As the rainy season descends, its branches become draped with golden flowers, a magnet for pollinating insects. For many, the Acacia is a 'tree of life.' It's a relationship as old as the Kalahari itself.
He reaches the final stage of his epic 650-mile journey, following the annual migration of Botswana's 130,000 elephants. Together with his guide Kane, Lev follows the elephants deep into the heart of the Okavango Delta, a vast wetland teeming with wildlife where every year more than 40,000 elephants gather to feed. Lev and Kane narrowly avoid a pride of lions who have brought down a male buffalo and watch as they move in for the kill, but are forced to wade through wide channels where crocodiles, hippos and snakes lurk.
Giant insects once dominated the earth before the dinosaurs. Thanks to new technologies combining genetics, ethology, geology and even particle physics, paleontologists can now recreate the missing branches of the tree of life. Assumptions have been shattered and all the rules are changing.