Martin Clunes learns how to look after the planet's vulnerable animals as he travels around the world meeting those trying to learn more about these beasts and who work to save and protect them.Martin heads to the Ningaloo reef in Australia and swims with the world's biggest fish, the whale shark, before taking part in the oldest Royal tradition - swan upping - on the River Thames.Then, on the Australian Phillip Island, he learns more about the successful and large breeding colony of the world's smallest penguin species, the fairy penguin.  Finally, Martin meets Bernard Richardson in Madagascar, who shows him around Ivoloina, a refuge and breeding programme for confiscated and rescued lemurs.