Bears: Spy in the Woods

A man forms an unlikely friendship with a wild otter while living in the remote Shetland Islands.

The life and the career of John Muir come to life through this inspiring and beautiful documentary set against the magnificent landscapes of the American West. The Scottish-born naturalist was one of the first nature preservationists in American history, inspiring others through his writing and his advocacy to keep the wilderness wild. Shot in high definition in the spectacular landscapes that shaped Muir - and were, in turn, shaped by his devotion.

Bears that are trained.

Once upon a time, there was a pedunculate oak (Quercus robur), born in 1810, 210 years old and a pillar in its kingdom. This spectacular adventure features an extraordinary cast: squirrels, barnacles, jays, ants, field mice... This vibrant, whirring, marvelous little world seals its destiny around the majestic tree that welcomes them, feeds them and protects them from its roots to its crown. A poetic ode to life, in which nature alone expresses itself.

A caving expedition recently discovered a community of dwarf crocodiles living in the Abanda Caves, Gabon. The crocs are living in pitch darkness, hunt bats and some have bright-orange skin. Part of the original team returns to find out more about this bizarre phenomenon. It's mission impossible to access the crocs world and there's no way of knowing what they might find.

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!!

David Attenborough narrates the charming and fascinating story of some real-life animal romantics. There are show-offs and singers, dancers and fighters, stories of undercover affairs and heartwarming devotion. These include a male polar bear that plays hard to get, a lemur whose odour bags him a mate and a lizard who is tender and faithful to the very end. It reveals that animals can be loving, complex, funny and inventive - it is all part of the mating game.