Martin meets animal behaviourist Sean Ellis, who lives with a pack of wolves, and Monty Roberts, the legendary horse-whisperer to learn about inter-species communication.
Martin Clunes investigates working animals around the globe including macaque monkeys collecting coconuts in South East Asia and using cormorants to fish in Japan.
In Tasmania, Martin learns of the horrible facial cancer endangering the legendary Tasmanian devil and how hope is on the horizon.