Martin begins this new adventure in French Polynesia where he swims with sharks, investigates Marlon Brando's wildlife programme, and meets a local horse whisperer.

In Vanuatu, Martin climbs an active volcano and meets a tribe who worship Prince Philip. In Tonga, the presenter meets a third gender leiti and a princess. And in Fiji he visits an island singer and a tribe tricked out of their homeland by a British mining company.

Martin explores the Galapagos, getting up close to sealions, iguanas, tortoises, penguins, finches and baby sharks. He joins conservation expeditions, sees evolution in action, visits a nun, an organic farm and the site of a murder mystery.