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