The actress heads to the island of Shikoku hoping to gain a better understanding of Japanese Buddhism. She then takes a bullet train to another island - Kyushu - where she finds the Henn Na Hotel, the world's first robot hotel. At Nagasaki, she visits Shiroyama Elementary school, one of the only buildings to survive the atomic bomb dropped on the city in 1945. Joanna then travels to Sakurajima, one of the country's most active volcanoes, before heading to the islands of Okinawa where one of the bloodiest battles of the Second World War was fought.
The actor begins the next part of his journey on Mundoo Island, which has provided shelter and a way of life for five generations of one farming family. Martin Clunes joins Colin and Sally Grundy for a day of cattle mustering. He also explores Phillip Island, one of Australia's favourite playgrounds, then heads south to King Island, in the blustery Bass Strait between Tasmania and mainland Australia. Martin completes his odyssey with a visit to see one of the region's most iconic creatures, the Tasmanian Devil
Michael begins the third leg of his journey in the mineral-rich state of Minas Gerais, where he learns about the Brazilian mining industry and meets some of the people dedicated to overturning the environmental damage it causes. He then heads to Rio de Janeiro, focus of the next World Cup and Olympics, where the authorities are ridding the streets of violent drug gangs that have controlled the city's shanty towns. On a lighter note, the globe-trotting broadcaster also learns to celebrate a goal like a well-known radio commentator and visits a `love hotel'.
Joanna ends her 5,000 mile journey in the place where she was born, Srinagar in Kashmir. She starts off in the Ranthambhore National Park, where she hopes to spot a tiger in the wild. Meeting tiger conservationist Belinda Wright, Joanna witnesses the work of local NGO Tiger Watch, who are attempting to break a cycle of poaching and poverty through education. Home to over 18 million people, Delhi is a city of stark contrasts. The extreme differences are obvious when Joanna visits a homeless community - where 10,000 men live under a flyover - and visits the modern part of the city where she has a go at working in a hi-tech call centre. The final leg of her journey takes her north from Delhi to Dharamsala, where she is granted a private audience with His Holiness the Dalai Lama. Joanna concludes her trip with a stay on a houseboat in Srinagar, as her parents did on honeymoon in 1941.