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Chris explores the remarkable ways animals use their senses. Focusing on dogs, he discovers how their powerful sense of smell creates a bizarre alternative reality.

Chris Packham explores the minds of the cleverest animals on the planet, discovering the astonishing abilities of the best, and most unlikely, animal problem-solvers on the planet, crows. He witnesses a remarkable world first as they solve the most complicated animal-puzzle ever completed. And he uncovers the extraordinary range of animal intelligence: bees which navigate, cockatoos which pick locks and a brilliantly ingenious octopus.

Chris Packham uncovers why the most intelligent animals on the planet are also the most social. This episode focuses on one of the cleverest animals of all, the dolphin. Swimming with a pod of dolphins in the Bahamas, Chris explores their language and sees how they can recognise themselves in the mirror. He also witnesses the duplicity of chimps and watches elephants mourn their dead.