To discover just how like us animals really are, animatronic spy creatures infiltrate the animal world to explore their complex emotions. Spy Pup makes friends with a wild dog pack to investigate their maternallove and has a dangerous encounter with lions and elephants.

Baby Spy Crocs discover the extraordinary devotion of a mother crocodile and take a rollercoaster ride inside her mouth as she carries her babies to water.

Spy Egret and Spy Tortoise are nearly trampled by elephants as they film a newborn baby sharing the love of his caring family. Spy Monkey meets a troop of over 120 unruly langurs and finds out how teenage monkeys comically practise babysitting skills.

Spy Prairie Dog witnesses the most enthusiastic kissers in the animal world. Spy Chick discovers the extraordinary devotion of hornbills as a mother is imprisoned for the sake of her brood.

In Antarctica, Spy Adelie Penguin becomes entangled in the penguins' turbulent love life as they fight to steal pebbles to impress a fussy female.

On the savannah, giraffes are filmed for the first time paying homage to an old giraffe that recently passed away.

Spy Bush Baby meets some curious chimpanzees, and Spy Tortoise is adopted by a five-year-old and is taken on a wild ride through the jungle canopy before coming down to earth with a bump.

In a thought-provoking scene a chimpanzee shows empathy as he finds an abandoned wildcat kitten and adopts it as his pet.

The Spy Creatures are on another extraordinary mission as they discover how friendships are a vital part of animal societies. Spy Wolf Cub joins a pack of arctic wolves, where a real cub's survival depends on friendships in one of the harshest environments in the world. Spy Cub is anointed into the pack by a she-wolf that marks him with her own scent.

Spy Warthog meets some real warthogs and discovers the extraordinary relationship they have with mongoose. He even experiences the mongoose's personal grooming service as they explore every nook and cranny. Spy Hippo comes face to face with an angry hippo, before discovering their relationship below the surface with some very fishy skin clinicians. Spy Cobra meets the real meerkat mob and is quickly dispatched with a show of unified force.

A walking and swimming Spy Crocodile finds the nest site of a real crocodile and reveals the extraordinary relationship they have with the tiny dikkop bird, who will not only stand up to the crocodile but joins them in a neighbourhood watch scheme against marauding monitor lizards. Spy Rattlesnake helps uncover the mysteries of prairie dogs - who have the most extraordinary and complex language in the animal world. In the colony, Spy Prairie Dog finds the cutest owls on earth and we learn how they rely upon each other for protection against coyotes.

Chimpanzees take a bath in a jungle pool and show us that their social life is as sophisticated as our own. In the extraordinary climax, the chimps show how human organisation may have begun, as they spectacularly unite to hunt baboons.