1. You Are What You Sense

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.

3. Secrets of the Social World

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.