Levison and Alberto avoid escaped convicts and poisonous trees as they take in Mexico and Belize's jungles, the hurricane-wracked island of San Pedro and Guatemala's lawless wilderness of El Petacon.
James journeys through Japan's mountainous forests, marvels at its zen gardens and admires centuries-old bonsai, to explore the connections between Japanese culture and the natural environment. Travelling around Japan's stunning island geography, he examines how the country's two great religions, Shinto and Buddhism, helped shape a creative response to nature often very different to the West. But he also considers modern Japan's changing relationship to the natural world and travels to Naoshima Art Island to see how contemporary artists are finding new ways to engage with nature.
The Python star continues his first visit to Brazil by travelling by river from the northern border with Venezuela to the capital of Brasilia. Along the way he visits indigenous tribe the Yanomami, learning about the threat to their hunter-gatherer way of life, before watching a rehearsal by the Amazon Philharmonic Orchestra and searching for the remains of Henry Ford's unsuccessful attempt to build a vast rubber plantation in the middle of the rainforest. In Belem, music producer Priscilla explains why Amazonian women are such powerful forces, then he moves southwards, meeting rock star and political activist Dinho Ouro Preto, who believes that despite its social and environmental problems, the country is on the brink of becoming a superpower.
In central Thailand's forests, fertile plains and even city streets, nature finds a way of living alongside people. Spirituality can be found in human and animal relationships, both likely and unlikely. This bustling region is known as the nation's rice bowl - but even here, there are magical places to be found.
Bettany visits the west bank of the Nile opposite Luxor where, for 500 years, the Ancient Egyptians buried their pharaohs in the Valley of the Kings, among them the boy-king Tutankhamun. However, the historian crosses the local hills to the Workers' Village, where generations of skilled royal tomb-builders lived. As it turns out, they also dumped masses of domestic rubbish, which is now giving some insight into the highs, lows and preoccupations of ancient Egyptians. Bettany then heads south on the Nile's oldest steam ship SS Sudan, which inspired Agatha Christie to write Death on the Nile.
In the final episode of her Greek odyssey Julia reaches her ultimate destination - the island of Chios - where her family’s story began. This week she’s joined by her mother Chrissi and together they explore the home of their ancestors. In search of the fascinating history of mastica, a natural resin only found on Chios,
Levison Wood returns to the site of his car crash to resume the journey, and is reunited with the people who saved his life. He keeps a promise to Binod by accompanying him on a trek to his family home in Pokhara, before continuing their travels with members of the Gurung tribe, who risk their lives to collect honey from wild bees living on high cliffs. They visit the site of an earthquake in 2014 and visit Kathmandu, before crossing the border into Bhutan.