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.

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.