The Season 1 finale chronicles the journey of zebra through the Botswana wilderness to the rich grasslands of Nxai Pan National Park. It's Africa's longest land migration, and it includes challenges: lions, wild dogs, drought and starvation.
Caribou face hungry bears and wolves, deadly frozen rivers and rugged mountains as they undertake the world's longest land migration: 3000 miles through the frozen Arctic wilderness of Canada and Alaska.
The premiere of the documentary series, which spotlights animal migrations. First up: the annual gathering of thousands of elephants in northern Kenya. From bulls to orphans, they face deadly threats from both predators and poachers.