Oceans: Our Blue Planet

Filmmakers Alastair Fothergill and Keith Scholey chronicle a year in the lives of an Alaskan brown bear named Sky and her cubs, Scout and Amber. Their saga begins as the bears emerge from hibernation at the end of winter. As time passes, the bear family must work together to find food and stay safe from other predators, especially other bears. Although their world is exciting, it is also risky, and the cubs' survival hinges on family togetherness.

From 1968 to 1972, photographer and filmmaker Bob Campbell documented the activities of Dian Fossey as she developed a cross-species bond with Rwandan mountain gorillas. Campbell shot 70,000 feet of film, but only a fraction of his material was edited into the lecture presentation that preceded Fossey's Gorillas in the Mist. This program compiles highlights from the previously unreleased footage, offering an unforgettable glimpse into the gorilla community and Fossey's relationship with it. Her methods may not entirely jibe with those of modern conservationists, but there is no denying the profound impact of her work on current research and eco-activism.

In New York's Adirondack State Park, 46 mountains rise over 4,000 feet in elevation-these are known as the "High Peaks." The men and women who successfully reach the summits of all 46 peaks are known as the "46ers."

Documentary exploring the hundreds of species of life that thrive in total darkness at the hydrothermal vents along the Mid-Ocean Ridge, several miles below the ocean surface. Little food filters down from the surface and there is no sunlight to support photosynthesis.

By the end of the Ice Age - only ten thousand years ago - many great mammals had died out. The woolly mammoth, the dire wolf, the saber-tooth cat and others disappeared as a result of severe climatic changes that engulfed the planet. And yet other animals persevered. Today, they go on in dwindling numbers as the last of the Ice Age survivors. Scientists are piecing together their past while others work to safeguard the future of these living relics. Despite climate changes over the past 15,000 years and human predation, their descendants persist in a few unspoiled regions of the globe.

Filmed by Emmy Award-winning cinematographer Al Giddings, this timeless program takes a stirring look at the largest, tallest, longest-living things on the planet: trees. Stunning location footage captures the variety and the grandeur of the Pacific Northwest, the Florida Everglades, the Shenandoah Valley, and the Great Sonoran Desert. Quotations from Sierra Club founder John Muir and others who revere nature are interwoven with information on topics ranging from the function of forest ecosystems, to the effects of deforestation, to the integration of parks into urban landscapes.

The wildlife and cultures of southern Asia have been shaped by one of the greatest phenomena on Earth: the mighty monsoon winds that sweep across this vast region, turning drought into deluge. All life – human and animal – is dominated by this rampaging weather system. From the northern shores of Australia to the highest peaks of the Himalayas and the wind-blown deserts of northern India to the lush equatorial forests of Borneo, this series makes an exhilarating journey through the lands of the monsoon. Along the way, it offers a taste of the variety and colour of the different regions’ most extraordinary wildlife and cultures and the way they cope with the tumultuous weather. This is the story of a relationship between humans and nature that has grown across thousands of years – all living in the shadow of the monsoon.

In September 1954, David Attenborough, cameraman Charles Lagus, Jack Lester and Alf Woods, both from the Zoological Society of London, set out for Sierra Leone. They spent three months intently surveying the landscapes of Sierra Leone in search of nature’s rarest animals. Although predominantly searching for Picathartes gymnocephalus (the White-necked Rockfowl) they hoped to take back to London a representative collection of the whole of animal life in this part of Africa.

Marvel at "Old Faithful" erupting, vast rolling forests, abundant wildlife, thundering waterfalls, gurgling hot springs and mud pots, and the beautiful, haunting wilderness. Over 2.2 million acres located in the northwest corner of Wyoming, the great Yellowstone National Park was founded in 1872. The superb camera work of Dale Johnson and Bob Landis captures the natural wonders that captivated the early mountain men of the 1840s: petrified forests, mountains of glass and rivers that cooked fish. Thrill to rare and dramatic wildlife action; an antelope doe chasing a coyote from her young, a grizzly pursuing an elk in a life and death chase, a coyote matching wits with an otter; northern elk migrating in deep snow and bighorn sheep in mating battles. See the Yellowstone fire of 1988, and the charred land in full bloom. Ride with a park range into the backcountry. Enjoy a stagecoach ride to a sunrise cookout. It's all here, the magic of the great Yellowstone.

Antarctica is the most extreme continent on our planet—higher, colder, and even drier than any other on Earth, and although it is thousands of miles away, what happens here affects every single one of us.