The Secret Lives of Tigers • 2019 • episode "S1E1" • The Secret Lives of Big Cats

29:15

As almost all animal inhabitants of Antarctica are forced to migrate north, the sea underneath the frozen ice still provides a home to many specially adapted fish whose cells are protected from freezing through an "antifreeze" liquid. Many of them feed on the faeces of other animals. The most notable larger animal that does not migrate north is perhaps the Weddell Seal, which can be found as close as 1300 kilometres to the pole. Groups of seals tear holes into the ice to dive for food and come up to breathe. The females come back to the ice to give birth.

S1E5 • Life in the Freezer • 2003 • Nature

51:27

An elaborate river portrait-in this case of one of the greatest rivers of Europe. An epic journey of discovery into the continent's unknown wild lands, "Danube - Europe's Amazon" shows how the river's famous currents helped sculpt the incredible landscapes, and it links them together.

S1E2 • Danube - Europe's Amazon • 2012 • Nature

59:21

The squirrel family is one of the most widespread on earth, so what is the secret to their success? There are squirrels that can glide through the air, outwit rattlesnakes and survive the coldest temperatures of any mammal. We uncover the extraordinary abilities of these cheeky characters, putting their problem solving to the test on a specially designed assault course. We team up with some of the world's top squirrel scientists who are making groundbreaking discoveries - from the fox squirrel who can remember the location of 9,000 nuts to the grey squirrel whose tree-top leaps are the basis of new designs in robotics. We also see the world through the eyes of an orphan red squirrel called Billy, as he grows up and develops all the skills he will need to be released back to the wild. It is time to meet the animal family we should never underestimate - the super squirrels.

Natural World • 2018 • Nature

48:53

Venture into the deep, dark and desolate oceans that are home to an abundance of beautiful -- and downright strange -- creatures.

S1E6 • Our Planet • 2019 • Nature

43:31

Captured in a single, animated time lapsed shot, and based on archeological findings, we trace our epic journey from the first spark of life billions of years ago up to our present status as the most successful species on the planet. Humans are the pinnacle of a chain of species that has survived by way of evolution, natural selection, adaptation, and pure luck. From the formation of primordial genetic material to the development of speech, this is the improbable story of the incredible set of circumstances that led to human existence.

Naked Science • 2015 • Nature

49:58

The third instalment examines the spiders and others that produce silk. Attenborough visits New Zealand's Waitomo Caves, which are inhabited by fungus gnats whose illuminated larvae sit atop glistening, beaded filaments to lure their prey.

Part 3 • Life in the Undergrowth • 2005 • Nature