Episode 4 • 2019 • episode "S1E4" • Blue Planet UK

53:37

This instalment is the first of several to concentrate on mammals. The platypus and the echidna are the only mammals that lay eggs (in much the same manner of reptiles), and it is from such animals that others in the group evolved. Since mammals have warm blood and most have dense fur, they can hunt at night when temperatures drop. It is for this reason that they became more successful than their reptile ancestors, who needed to heat themselves externally. Much of the programme is devoted to marsupials (whose young are partially formed at birth) of which fossils have been found in the Americas dating back 60 million years.

9/13 • Life on Earth • 1979 • Nature

58:04

A mother puma must battle rivals, tackle prey nearly three times her size and endure the wild mountain weather of Patagonia in her bid to raise four cubs.

S2E1 • Dynasties • 2022 • Nature

88:47

A fascinating look at the secret, underground world of the ant colony in a way that has never been seen before. At its heart is a massive, full-scale ant nest, specially-designed and built to allow cameras to see its inner workings. The nest is a new home for a million-strong colony of leafcutter ants from Trinidad. For a month, entomologist Dr George McGavin and leafcutter expert Professor Adam Hart capture every aspect of the life of the colony, using time-lapse cameras, microscopes, microphones and radio tracking technology. The ants instantly begin to forage, farm, mine and build. Within weeks, the colony has established everything from nurseries to gardens to graveyards. The programme explores how these tiny insects can achieve such spectacular feats of collective organisation. This unique project reveals the workings of one of the most complex and mysterious societies in the natural world and shows the surprising ways in which ants are helping us solve global problems.

2013 • Nature

24:00

On an island in the world's largest freshwater lake, a single, isolated population of moose battle for survival against a pack of wolves. Find out how this delicate ecosystem in the midst of Lake Superior reveals invaluable scientific information on the dynamics of predator-prey relationships.

S1E1 • Great Lakes Wild • 2017 • Nature

45:18

Making Of (Special Fly On The Wall inserts at the end of each programme will explore, in greater detail, how the BBC's Natural History Unit was able to capture such stunning footage for the first time.)

Extra • Life in the Undergrowth • 2005 • Nature

58:05

This special, narrated by Andrew Scott, celebrates the drama of Autumn and how animals and plants deal with the new challenges it brings. This is the time of year that brings the world's most spectacular transformations. With winter fast approaching, life has to get ready and that means feeding up while you can, fighting for the last chance to breed and rushing to grow up before the cold returns. While chipmunks and beavers dash to stash their winter supplies, many animals from musk oxen to beetles have to battle for mates and young gannets must face life's first dangerous challenges.

S1E2 • Earth's Seasonal Secrets • 2016 • Nature