Spy Pup is immersed in wild dog life to explore their maternal love, while Spy Penguin records the turbulent action of the mating season, as a male Adélie penguin falls victim to a pebble thief that ruins his chances of love for the season. Spy Tortoise and Spy Bushbaby keep watch on chimpanzees, while, in perhaps the most moving scenes, Spy Monkey becomes the focus of attention for a troop of concerned langurs who believe the motionless camera-creature has died.

Arctic wolves group together to survive in one of the harshest landscapes on earth, a band of hungry mongooses groom warthogs for tasty morsels - before turning their attention to Spy Warthog - and fish help clean hippos' bodies, as well as providing a unique dental service. Meanwhile, crocodiles and dikkop birds take part in a mutual neighbourhood watch against hungry prowling monitor lizards and Spy Rattlesnake captures how prairie dogs and burrowing owls use their language skills to tell the rest of their community of approaching danger.

A behind-the-scenes view of the extraordinary idea of deploying the Spy Creatures, showing how the concept evolved and became the inspiration for the animatronic animals of the series. This documentary reveals the painstaking work behind building the lifelike models, from first concept until they become `alive' for the first time.