Simon Reeve visits the tropical Indian Ocean Islands of Madagascar, Mauritius and the Seychelles on the second leg of his journey. Amid the paradise of coral reefs and jungles full of spectacular wildlife, Simon witnesses some of the threats to the Ocean.
This first leg takes him from the rugged coast of South Africa, where he joins the fight against wildlife poachers, through Mozambique, and on to the tropical island of Zanzibar. On the way, he swims with sharks, meets the refugees who have found shelter in a luxury beachfront hotel, and travels on a huge container ship fortified against the constant threat of pirates.
The third leg of the adventurer's journey takes him from the south of Kenya to the Horn of Africa. Along the way he joins a Ugandan peace-keeping force in Mogadishu, the capital of war-torn Somalia, which turns out to be the most dangerous leg of his journey as he ends up under fire on the front line. In contrast, he finds neighbouring Somaliland a stable and democratic home to thousands of Somalis fleeing fighting and famine. In Kenya's Tana Delta, he meets villagers facing eviction from an area that the government is turning over to sugar cane production for bio-fuels.
The fourth leg of the broadcaster's journey takes him from Oman to the Maldives. He starts in the Strait of Hormuz, where oil from the Gulf is shipped through the narrow channel, then moves on to Mumbai, the ocean's biggest port. In the Maldives, Simon finds arguably the most beautiful collection of tropical coral islands in the world - but the fragile underwater environment is a barometer for the changing nature of the sea, as he witnesses how bleaching has damaged the coral and one entire island has been manufactured as a landfill dump to deal with the problem of rubbish.
The adventurer reaches Sri Lanka, whose strategic location and tropical spices made it a target for invaders and colonisers for centuries. In the north he visits the scenes of vicious battles between the Tamil minority and the Sri Lankan army, traumatic events from which the population is still recovering. On his way to Bangladesh, he hitches a ride on a trawler, highlighting one of the Indian Ocean's fastest-growing industries - providing prawns for the West. But as he reveals, it comes at a price for the environment.
The adventurer begins his final leg on the northern tip of Sumatra, near the epicentre of the 2004 Boxing Day tsunami, finding out how the province of Banda Aceh has undergone many changes since the disaster. He also explores the illegal trade in exotic pets in the Indonesian capital of Jakarta, before heading for Australia, the final country on his epic journey. There he visits the unspoilt wilderness of the Kimberley region, meets a real-life crocodile hunter and goes fishing with Aborigines campaigning to stop the construction of a giant gas plant.
Simon travels from Darwin in Australia's Northern Territory or 'Top End', across to the remote Cape York Peninsula, and on to the Great Barrier Reef. Simon sets off from Kakadu, the largest national park in the world, where the wildlife is under threat from the march of millions of poisonous cane toads. He joins a team of toad-busters catching the amphibian invaders - originally introduced to the country to kill pests. In Robertson barracks Simon meets Australia's best - and only - tank regiment. They will soon host 6,000 American Marines - evidence of Australia's strategic importance in the Asia Pacific region. On the Cape York Peninsula Simon joins scientists catching deadly box jellyfish, whose venom could prove to have great medicinal value. And on the Great Barrier Reef he dives in search of the starfish destroying coral, before flying 100 miles out into the ocean to watch as a huge tanker is expertly guided through the fragile reef.
Joanna meets the Maharaja of Dungarpur, who shows her around his lakeside palace. In stark contrast, Joanna visits a Dalit community - considered to be India's lowest caste - in Gujarat, and hears of the everyday discrimination these people experience under India's still deeply entrenched 3,000-year-old caste system. She later joins in a Hindu house warming ceremony, where a cow and calf are brought into the new house for luck. Braving the roads of Mumbai, Joanna takes a ride in the city's only all-female taxi company and visits the Times of India, where her uncle was editor of the paper in the 1930s and 40s. She then overcomes her vertigo to explore the World One Tower, soon to be Mumbai's tallest luxury residential building.
Joanna begins a 2,000-mile journey across Japan in Hokkaido, where she meets one of the most important animals in Japanese culture, the red-crowned crane. She arrives in Sapporo during the middle of the annual Snow Festival and meets members of the local indigenous community, before travelling into the Fukushima exclusion zone and taking a bullet train from Nagano to Tokyo.
Giles Coren and Monica Galetti head to the Andean Cloud Forest of Ecuador to work at Mashpi Lodge, a $10-million modernist hotel featuring an extraordinary gondola cable car that 'flies' guests one mile through the jungle canopy at a dizzying height.
Episode 3 takes us to Northern Romania and the Maramures - one of the most picturesque regions in Romania. Here we experience festivals and weddings and learn about the evolution of traditional folk music with renowned singer Grigore Lese and pop idol Loredana Groza. We visit historic wooden churches and villages, which have been preserved, despite the march to modernise. Charlie Ottley explores the wilderness by steam train and on foot through Caliman National Park and the mysterious Twelve Apostles. Further east we drop in on a scheme to rewild Buffalo and visit the incredible painted monasteries of Bucovina before heading south to see what's being done to protect the ancient forests of Transylvania. En route Charlie meets a number of local and internationally acclaimed characters and looks at ways tourism is helping to preserve natural habitats. Wild Carpathia 3 finishes with some enlightened words from HRH The Prince of Wales who once again describes his passion for Romania and the urgent need to protect its rural heritage.
The seasoned traveller explores the South American country, beginning in the north-east - where Europeans first landed and grew rich on the profits from sugar and tobacco plantations run with slave labour. In Sao Luis, Michael finds out about a ceremony based on a 200-year-old tale before heading to the coastal lagoons of the Lencois Maranhenses National Park. Journeying inland, he gets a glimpse of the fast-disappearing world of old-style cowboys known as vaqueiros, has his fortune read by a Candomble priest and learns to drum with the Olodum cultural collective.