In this first episode, we see the spies search for intelligent life and mind-boggling ways of thinking. The largest and most ambitious spy creature ever built has a close encounter with the owners of the largest brains on the planet: sperm whales. Spy whale is the same size as a newborn whale calf and can swim and dive like the real thing.In Thailand, spy macaque swims with freediving monkeys and captures behaviour that has never been seen before: macaques catching fish with their bare hands. In Japan, spy puffer fish encounters an artistic genius, a male Japanese puffer fish that crafts exquisite sand sculptures to woo a mate. Spy puffer becomes the artist's assistant as it finds shells to help it complete its masterpiece.In the Caribbean, spy hermit crab loses its camera shell to a real hermit crab during a house swap. The thief becomes an unwitting camera operator and gains a crab's-eye view as the crabs line up to exchange shells in order of size. Also in the Caribbean, spy pig joins a colony of wild pigs as they cleverly take to the ocean to find food.From fish that use teamwork to solve problems, to a rare social gatherings of whales in deep conversation, this action-packed first episode gains startling new insights with feats of intelligence surprisingly similar to our own.