Kirsty Young's castaway is the scientist Dr Robert Langer. Institute Professor at the Massachusetts Institute of Technology, he is the most cited engineer in history, and was awarded the prestigious US medals of both Science and of Technology and Innovation. A pioneer of many new technologies including controlled release drug delivery systems and nanotechnology, Langer is also regarded as the founder of tissue engineering in regenerative medicine where synthetic structures are used to provide the scaffolding on which new skin, muscle, bone and potentially entire organs can be grown.

Born in Albany, New York, in 1948, Langer's interest in science was kindled by the Gilbert chemistry, microscope and building sets he was given as birthday presents by his parents. He studied chemical engineering at Cornell University before getting his Doctor of Science from MIT in 1974. His enthusiasm wasn't fired up by the many job offers from oil companies he received, preferring to apply to work in the medical sector. After many unsuccessful applications, he was hired by Dr Judah Folkman, a surgeon at Harvard, who tasked Langer with isolating a compound to restrict blood vessel growth in order to stop a tumour from growing. His work at the interface of medicine and engineering led to him being awarded the Queen Elizabeth Prize for Engineering in 2015. He attributes his success to "a combination of stubbornness, risk taking, perhaps being reasonably smart and wanting to do good".

Producer: Christine Pawlowsky.

Kirsty Young's castaway is the concert pianist and composer Stephen Hough.

He discovered he liked playing the piano when he went to visit his aunt's house and could pick out more than one hundred nursery rhymes on her piano. After much pestering, his parents bought him a cheap second hand piano from an antique shop. He went on to become one of the youngest students at the Royal Northern College of Music before winning a scholarship to The Juilliard School in New York.

His career began in 1983 after winning the Naumberg Piano Competition. He divides his time between New York and London and performs all over the world. He also has a prolific recording career and has won many awards for his discs.

Producer: Sarah Taylor.

Kirsty Young's castaway is the journalist and broadcaster Christiane Amanpour. Her career as a reporter was forged in some of the world's most hostile environments from Bosnia to Rwanda and Iraq to Israel. From the early '90s onwards she was so ubiquitous on screen that her peers in the press pack coined the darkly comic phrase "where there's a war, there's Amanpour."

Born to an Iranian father and a British mother, she initially wanted to be a doctor, but the Revolution in Iran in 1979 galvanised her political consciousness and she turned to journalism. Her first major assignment was in Saudi Arabia where she covered the 1990 invasion of Kuwait. She describes her time in Bosnia as a life-changing experience which made her determined to tell the stories of ordinary people caught up in the chaos of conflict.

During her career she has interviewed some of the biggest names on the world stage from Bill Clinton and Tony Blair to Robert Mugabe and Colonel Gaddafi. The winner of 11 Emmy Awards, she now anchors her own nightly television show on CNN although she can be whisked away at a moment's notice to cover major disasters around the globe. She has borne witness to some of history's worst atrocities but what gets her through is her eternal optimism and the courage and dignity of humanity.

Producer: Paula McGinley.

Kirsty Young's castaway is the mezzo-soprano Joyce DiDonato. Winner of two Grammy Awards, she is best known for her interpretations of Handel, Mozart and Rossini operas. Born into a Catholic family in Kansas, she was the second-youngest of seven children. Her love of music was awakened by watching her late father directing the local church choir. Her first ambition was to become a music teacher, but watching a televised performance of Don Giovanni during her third year at college ignited her interest in opera. After acceptance onto Houston Grand Opera's young artist programme, she overhauled her technique and went on to win second place in 1998's Operalia competition.

Her first big role came in 2002 singing Rosina in The Barber of Seville in Paris and she made her debut at New York's Metropolitan Opera in 2005 at the age of 36. Since then her star has shone brightly and she has performed across the operatic spectrum, from contemporary works, such as Jake Heggie's Dead Man Walking to Strauss and Handel.

Producer: Cathy Drysdale.

Kirsty Young's castaway is the baker and winner of The Great British Bake Off in 2015, Nadiya Hussain.

One of six children born to Bangladeshi parents in Luton, it was her father - a restaurateur - who encouraged her to cook. Having grown up in a culture where dessert wasn't common, her love of baking was awakened by her Year Ten home economics teacher.

She had an arranged marriage to Abdal in her early twenties and stayed at home to bring up their three children until her husband encouraged her to apply for the Bake Off. She was selected and over 15 million viewers watched her beat her fellow finalists Tamal and Ian.

Since winning Bake Off, Nadiya has been writing a column for the Times Magazine and has published her first cook book. She also has further books and a TV programme in the pipeline.

Producer: Cathy Drysdale.

Kirsty Young's castaway is the cartoonist Michael Heath.

He's been working for newspapers and magazines for sixty years and sold his first drawing to the Melody Maker in the 1950s. For the past twenty five years he's been the cartoon editor of The Spectator magazine.

Born in London in 1935, his early schooling was interrupted by the Second World War and by the age of twelve he was still unable to read and write. Both his parents drew professionally and after one unhappy year at art college, Michael left to pursue a freelance career as a cartoonist.

During his prolific career, Michael has created many cartoon strips including 'Great Bores of Today' which ran for nearly thirty years in Private Eye and 'The Regulars' which was centred on his Soho drinking crowd who included the writer Jeffrey Barnard and the artists Francis Bacon and Lucien Freud.

Producer: Sarah Taylor.

Kirsty Young’s castaway is the writer Jilly Cooper.

Her long writing career spans newspaper columns for the Sunday Times and the Mail on Sunday, non-fiction books on class, marriage and animals in war and novels that sell in their millions. Her romances set in the late seventies - including 'Bella', 'Harriett', 'Imogen' and 'Prudence' – were followed by 'Riders' in 1985, the first of her Rutshire Chronicles. Set mainly in the Cotswolds, they are racy and raunchy page-turners exposing the scandalous – and often hilarious - goings on among the British upper classes.

Born in 1937 in Essex, she was brought up in Yorkshire and enjoyed a happy childhood surrounded by dogs and ponies. At boarding school she earned the nickname, ‘the unholy terror’ and having failed to get into Oxford and being sacked from a number of jobs for her inability to type, she turned to journalism before publishing her first book, 'How to Stay Married' in 1969.

She married Leo Cooper in 1961 and, unable to have children of their own, the couple adopted Felix and Emily in the late 1960s. The couple were married for 52 years before his death in 2013.

Producer: Cathy Drysdale

First broadcast on BBC Radio 4 in 2016.

Kirsty Young's castaway is the engineer and international expert on aircraft noise reduction, Professor Dame Ann Dowling.

The first female president of the Royal Academy of Engineering, one of her passions is encouraging more young people, particularly women to choose engineering as a career. In 1998 she became the first female professor of Engineering at Cambridge University and went on to be the first female head of the Department.

As a child she was fascinated with how things worked, taking her bike apart aged six, and even dismantling the electric lights in her dolls house. Later, an over enthusiastic session with her chemistry set caused the conservatory curtains to briefly catch fire.

A passion for aeroplanes led her down the path of aeroacoustics and aircraft noise reduction alongside her hobby of flying airplanes.

She was awarded the DBE for services to science in 2007 and was appointed to the Order of Merit in 2016.

Producer: Sarah Taylor.

Kirsty Young's castaway is the entrepreneur, Levi Roots.

His business success began following an appearance on BBC Two's Dragon's Den in 2007. With guitar in hand, he sang about his 'Reggae reggae sauce' which he had been selling for years at London's Notting Hill Carnival. Both Peter Jones and Richard Farleigh invested in the business and within six weeks, his sauce was bottled and on supermarket shelves. Recipe books, TV shows and a restaurant, or 'rastaurant' followed.

He is the youngest of five children born in Jamaica. When he was four, his parents went to build a new life in the UK. Each year one of his siblings came to join the family in Britain. When Levi was 10, he left his much loved grandmother behind, never to see her again. Unable to read or write when he started school, he caught up quickly. He became a Rastafarian as a teenager. Following school, he became an apprentice engineer but left that to pursue a career in music.

In his late twenties, he went to prison for five years. His time inside would prove to be a turning point for him. Music continued to play an important part in his life and he was nominated for a Best Reggae Act MOBO award in 1998.

A father of eight, he lives in Brixton, London.

Producer: Cathy Drysdale.

Kirsty Young's castaway is the designer and sculptor Nicole Farhi.

Born into a Turkish family in France, Nicole's interest in fashion was present from an early age. As a child, she used to design clothes for her paper dolls; as a teenager, she was taken to couture shows in Paris by her stylish aunts.

Aged eighteen, she enrolled in fashion school in Paris and began selling her design sketches to earn a little pocket money, thus setting out on a career as a freelance designer. In the early 1970s, she met the British entrepreneur Stephen Marks who was just starting the retail chain French Connection where she became chief designer, and it was he who encouraged her to set up her eponymous label in 1982. Her fashion empire would eventually extend to New York, London and Tokyo before being sold in 2010, and Nicole herself left the business in 2012.

Since retiring from fashion, Nicole Farhi has dedicated herself to her other passion - sculpture. She sculpts predominantly in clay and then casts her works in different materials including glass, bronze and concrete.

She has been married to the playwright Sir David Hare since 1992.

Producer: Christine Pawlowsky.