Author of The Salt Path Raynor Winn takes Martha Kearney back to walk part of it: the south west coast path from Polruan in Cornwall, where her story ended and where the new film of her book is set. She talks about what nature means to her and how it effectively saved her life, and that of her husband, Moth. They set out to walk the 630 mile coast path when they lost their home and livelihood, and Moth was diagnosed with a terminal illness. They walked through it all and came out at the other end with renewed hope.

Raynor Winn is a long-distance walker and writer whose first book, The Salt Path, was a bestseller. Since then she's published The Wild Silence and Landlines, which also ends in Polruan, where she lived for some time. She grew up on a farm in Staffordshire and has always lived in the countryside. She tells Martha Kearney about her isolated rural childhood and how she feels most at home in nature. Her experience of homelessness changed her view of what home is. On a surprisingly blue and sunny but blustery day they walk the path as she and her husband did and Raynor recalls that time and reflects on how that experience has changed her.

Producer: Beth O'Dea

George McGavin is an entomologist, author, academic and television presenter. In this programme he shows Martha Kearney around the university research woodland at Wytham, just outside the city of Oxford. He explains how the natural world came to take on such a significance in his personal and professional life. He tells Martha why insects hold such a fascination for him, and together they explore the flora and fauna of the woodland.

Producer: Emma Campbell

Conservationist and adventurer Sacha Dench tells Martha Kearney about her love of the natural world. She explains how she came to fly a paramotor along the whole length the 4000-mile route that migrating swans take from the Russian tundra to the UK – leading to her acquiring the nickname ‘The Human Swan’. As they watch birds together at the Fernworthy reservoir in Devon, Sacha talks about her childhood growing up in Australia, where she says the beach and the bush were her playgrounds. She tells Martha about the paramotor accident which left her seriously injured and from which the sights and smells of the natural world proved a powerful aid to recovery. She describes her plans for the future and talks about what brings her hope.

Producer: Emma Campbell

Sir James Dyson is one of the UK’s best known inventors and businessmen. His Dyson vacuum cleaners, hair dryers and air purifiers have sold in their millions, both in the UK and around the world. In 2013, Sir James turned his attention to farming. He now runs the biggest farming business in the country, and owns 36,000 acres on which he produces potatoes, peas and strawberries. In this programme, Martha travels to his farm near Bath to find out more about his love for the natural world. She learns of how his early years growing up in Norfolk helped inspire him not just in business, but also in farming. He talks about the impact losing his father at a young age had on him, his experience of working on farms as a teenager and his hopes for the future of farming in the UK. Martha also gets to see the Dyson approach to farming, where robots are being taught how to identify and pick strawberries which are grown in one of the UK’s most technically advanced greenhouses.

Producer: Ed Prendeville

Hugh Fearnley-Whittingstall is a chef, broadcaster, author and campaigner. His 'River Cottage' series ran for more than ten years on Channel 4 and he has written more than twenty food and cookery books. In this programme Martha Kearney catches up with Hugh at an event at the Abergavenny Food Festival. He tells her how his love affair with the countryside started at the age of five when his parents left London and moved to a farmhouse in Gloucestershire. He recalls a fascination with the natural world in his early years, remembering a childhood spent roaming the fields and collecting birds' eggs, and recounting an incident in which he accidentally squashed a lizard while trying to put it into a biscuit tin. As a student he intended to work in wildlife conservation and had hopes of becoming the next David Attenborough, before a job at River Café set him on a different path. The natural world still fascinates and inspires him today. He tells Martha about the emotional hold it has over him, describing a time during lockdown when he was moved to tears of joy by seeing the blue flash of a kingfisher.#

Photo copyright Abergavenny Food Festival, photographer Tim Woodier.

Producer: Emma Campbell

Adjoa Andoh has played lead roles with the Royal Shakespeare Company and the National Theatre, and is a familiar face to fans of Casualty and Doctor Who. She is probably best known as Lady Danbury in Bridgerton, the hit Netflix series. Her roots, though, are firmly in the countryside. She grew up in the village of Wickwar, just north of Bristol, where she and her brother were the only black children in the area. In this programme she tells Martha Kearney about her rural childhood and the lasting love of the natural world it instilled in her. She takes Martha on one of her favourite walks on the South Downs. Together they spot birds, stop to admire sweeping views of the sea, where Adjoa swims year-round, and talk about landscape, religion and the restorative power of nature.

Producer: Emma Campbell

Martha Kearney meets Kathy Willis, Professor of Biodiversity at Oxford University, at Kathy's local stamping ground of Port Meadow, the protected common land in the heart of Oxford, to hear about how her love of the natural world has shaped her life.

Growing up in London, Kathy has always been someone who spends a lot of time outdoors - whether in city parks, rural campsites or cycle trips abroad. Her mother instilled in her a deep respect for nature, teaching her the local names of plants from a young age. Kathy shares how she carried on this passion into her degree, and later PhD in palaeobotany at Cambridge. She's since researched how ecosystems help protect us from climate change and floods, and more recently has been exploring the relationship between nature and health in her book, Good Nature.

Kathy chats with Martha about the scientific evidence about why interacting with nature really does make you feel better, from sight, smell, sound and the hidden sense - your microbiome. They wander around this special, wintery meadow close to where Kathy lives, with its glorious open views stretching into the distance, and reflect on the myriad of benefits it brings to both humans and wildlife.

Producer: Eliza Lomas

Martin Clunes is best known for his roles in the long-running TV series Doc Martin and the 1990s sitcom Men Behaving Badly. He's also known as an animal lover, but few people are aware of the wider importance of nature for him. In this programme Martha Kearney travels to his Dorset farm to meet Martin and find out more about his love of the natural world. She learns of the sanctuary it provides for him from the hectic life of an actor. Together they take his five dogs for a walk, including the retired guide dog Martin gave a home to after hearing about her on a radio programme. He introduces Martha to his horses, as he prepares one of them for a show the next day, chatting to her while on his hands and knees shampoo-ing the horse's fetlocks. He explains how horses were the reason why he came to buy a farm by chance.

Producer: Emma Campbell