South Africa's Phinda Game Reserve is home to Africa's most elusive big cat: the leopard. Kezi, one of the reserve's female leopards, has been sneaking into neighboring farms and preying on cattle. Her raids have raised the ire of local farmers and this daring hunter now faces becoming the hunted. Scientists must capture and relocate Kezi before she takes one step too far.

In Kenya lives an enigma of nature: the maneless lions of Tsavo. Long dismissed as savage killers, Dr. Bruce Patterson has spent years attempting to dispel the stigma by recording their behavior. Now, as he fits a young male with a GPS collar, he finally has the opportunity to convince the rest of the world that their bad reputation is undeserved.

On the edge of the planet's most active volcano rages an ancient battle for survival. The waters surrounding the island of Stromboli teem with a singularly extraordinary animal: the octopus. With an army of remote and underwater cameras exploring the deep seas of the Mediterranean, filmmaker and biologist Natali Tesche uncovers the secrets of how the octopus manage to thrive here.

The Kruger National Park in South Africa has become a victim of its own success. There are just too many elephants and the wide variety of wildlife is under threat from a combination of overpopulation, disease and drought. Follow the incredible effort of moving one thousand elephants to neighboring Mozambique and Zimbabwe in one of the biggest relocation projects ever attempted.

These iconic Australian mammals have been Olympic mascots, the subject of countless children's books, and the star attraction at zoos around the world. Yet in their native Australia, these cuddly subterranean engineers enrage farmers and home owners by tunneling under buildings and fields. This is the story of the wombat's fight for survival and the few passionate individuals determined to save them.

The Arctic is beautiful, but it is also one of the most hostile places. Cold rules this northern land, holding life at bay. Very few mammals can survive in this icy kingdom. In the sea, a trio of whales has conquered the killing cold of Arctic waters: the snow white beluga, the mighty bowhead whale and the narwhal, famous for its bizarre unicorn-like tusk.

The exotic island of Borneo is home to a species of elephant unlike any other. Standing three feet shorter than their African cousins, these diminutive giants face extinction unless immediate action is taken to protect them. This is the story of a remarkable relationship between a single man, Bert Dausip, and the extraordinary animals he has devoted himself to protect.