Alien Sharks: Return To The Abyss

Every year, thousands of Antarctica's emperor penguins make an astonishing journey to breed their young. They walk, marching day and night in single file 70 miles into the darkest, driest and coldest continent on Earth. This amazing, true-life tale is touched with humour and alive with thrills. Breathtaking photography captures the transcendent beauty and staggering drama of devoted parent penguins who, in the fierce polar winter, take turns guarding their egg and trekking to the ocean in search of food. Predators hunt them, storms lash them. But the safety of their adorable chicks makes it all worthwhile. So follow the leader... to adventure!!

500 million years ago life left this blue womb and colonized the land, but we are still intricately linked to the ocean. Our climates, coastlines, ecosystems, and economies are tied to the perpetual movement of water between continents. The great ocean currents are the arteries and veins of Planet Earth! This is the story of one particularly fascinating flow – the East Australian Current, a massive oceanic river that stretches the length of Australia’s east coast.

Baby Emperor Penguin Pengi and Sommi's Ultimate Challenge Begins! At 60 degrees below zero, winter has come to the South Pole, the coldest glacial region in the world. Abandoned due to its bitter coldness, the South Pole is greeted by the real natives of this place, the Emperor Penguins, who have come to welcome new lives. Through the indescribable love and care given by mom and dad, baby Emperor Penguins Pengi and Sommi awake from their egg shells. Gluttonous Pengi, the number one trouble maker in the South Pole, and cutie Sommi, who loves daddy's embrace the best, become great friends. Then one day, Sommi’s dad goes out to the sea to seek her out. Sommi left all alone, cold and starving to the brink of death, and Pengi desperately tires to help Sommi through her troubles. Could Pengi and Sommi possibly overcome numerous hardships and become beautiful full-grown Emperor Penguins?

Asia is home to the world's most lethal serpents, but which of its scores of slithering predators is the deadliest? Join venom expert Bryan Fry on his cross-continental quest to find the perfect serpentine killer.

As the largest island in the Caribbean, Cuba is host to spectacular wildlife found nowhere else on the planet: from the jumping crocodiles of the Zapata swamp to the world's tiniest hummingbird, from thousands of migrating crabs to giant, bat-eating boas that lie in wait for easy prey. Decades of a socialist, conservation-minded government, American embargoes and minimal development have left the island virtually unchanged for 50 years. As international relations ease, what will become of this wildlife sanctuary?

Cats are cuddly felines and lovely pets, but also highly evolved predators that hunt huge amounts of small mammals, birds and reptiles; perfect killing machines that threaten delicate ecosystems around the world.

This heart-warming documentary shows true stories about the unconditional loyalty between humans and dogs and investigates our best friends' remarkable intelligence, their outstanding sensory abilities and emotional bond to us humans.