The spy creatures go undercover to explore the world of animal intelligence and reveal their use of tools, self-medication, culture and subterfuge. In Borneo, the most lifelike spy creature yet meets realorangutans and discovers how they use human tools. Spy Orang films how they wash with soap and how this behaviour is now part of their wild culture. In one of the most extraordinary scenes ever filmed, a wild orang uses a saw and competes with Spy Orang!

Spy Otter takes us to the heart of the sea otter colony to reveal their ingenious methods of finding and cracking open a meal. Spy Bushbaby infiltrates the world of chimpanzees to witness their problem solving and tool making, and is even hunted by a curious chimp. Spy Squirrel discovers how real squirrels use intellect and subterfuge to outwit other thieving squirrels.

Spy Ostrich Chick joins hatchlings in a nest and witnesses the daring trickery of the mother as she cleverly lures a leopard away from her vulnerable brood. Spy Termite Mound explores how drongo birds mislead meerkats in order to steal their food. Spy Crow films the world's most intelligent crow as he fashions tools from sticks to extract grubs and uses stones to crack nuts.

Capuchins discover that Spy Rock offers a convenient way to smash open their favourite food. Spy Sloth meets a real sloth and reveals the incredible jungle pharmacy that exists amongst its fur. In a magical scene, Spy Macaw, Spy Peccary and Spy Spider Monkey are our guides to a secret glade where jungle medicine abounds. This revelatory programme reveals that animals are far cleverer than we ever realised.

The Spy Creatures discover that mischief is rife in nature, but perhaps there are still rules that govern animals' lives.

Spy Macaque visits a monkey swimming pool where teenage tearaways attempt the high dive causing chaos for parents teaching babies to swim. Spy Tropicbird reveals how frigate birds ruthlessly steal fish from real tropicbirds. In Australia, a bowerbird decorates his courtship bower with blue treasures, and a smart imposter attempts a daylight robbery on his precious horde. Spy Bowerbird investigates the shenanigans complete with his own nest rigged with irresistible Jewelcams. In Antarctica, Spy Penguin keeps a beady eye on a crafty Adelie penguin as he uses a storm as cover to steal stones from other penguin nests. As the storm clears, skua birds arrive and steal the penguins' eggs, and Eggcam captures the most astonishing aerial view of a penguin colony ever seen.

Among chimpanzees, an illicit affair creates outrage among the dominant males, and a similar misdemeanour in a meerkat colony results in some very rough justice. A spectacular war dance follows as neighbouring meerkat groups battle over territory. A gang of surf-loving dolphins get their teenage kicks from a poisonous but intoxicating pufferfish, and lemurs try out natural highs when they use millipedes as insecticides with some very dreamy side effects. Spy Wolf Cub watches as naughty wolf cubs are taught the hard rules of pack life, and Spy Egret joins forces with a state-of-the-art Dungcam to see how elephants discipline their misbehaving youngsters. In a spectacular finale, an impudent chimpanzee stages a challenge to the troop leader, resulting in a fight with weapons that hints at how human warfare may have begun.