Jesse Karmazin’s Ambrosia Plasma clinic promised the fountain of youth, two litres of young plasma at a time.

For a fee, anyone could go to his treatment centre in the redwood forest outside Silicon Valley and receive an infusion. The results - according to Karmazin - were remarkable. Silicon Valley billionaires were rumoured to be queuing up for their young blood.

The problem was, the scientists whose work in mice he claimed to be bringing to the people disagreed with what he was doing, and he never backed up his claims with data. A journalist stepped in to investigate, and what she found was Silicon Valley hype without any substance.

In this series, technology reporter and psychologist Aleks Krotoski explores the frontiers of the extreme longevity pioneers. They've made their money in Silicon Valley. And with their technology solutions - PayPal, Facebook, cryptocurrencies - they've ushered in the world that we live in today, with all its unintended consequences. Some of them now want to solve the "problem" of aging, or even death, and they are making bigger strides than we may think.

Can they? Should they?

A Pillowfort production for BBC Radio 4

New episodes released Mondays. If you're in the UK, listen to the full series of Intrigue: The Immortals first on BBC Sounds: bbc.in/3WEQS5W

The Conboys’ experiment gave a young Harvard medical school graduate a big idea. But, there is a big gap between the experiments they did with mice in the lab, and pumping young blood into human beings.

Still, he registered his company, Ambrosia Plasma, on the Food and Drug Administration clinical trials website and began an ambitious human research experiment. For $8,000 in cash, cheque or digital transfer, anyone over the age of 35 could receive two litres of blood plasma from 16-25 year olds in their veins. The outcomes were ambitious - physical rejuvenation, weight loss, reversal of dementia, and healthy looking skin.

Does this fairy tale have a happy ending?

In this series, technology reporter and psychologist Aleks Krotoski explores the frontiers of the extreme longevity pioneers. They've made their money in Silicon Valley. And with their technology solutions - PayPal, Facebook, cryptocurrencies - they've ushered in the world that we live in today, with all its unintended consequences. Some of them now want to solve the "problem" of aging, or even death, and they are making bigger strides than we may think.

Can they? Should they?

A Pillowfort production for BBC Radio 4

New episodes released Mondays. If you're in the UK, listen to the full series of Intrigue: The Immortals first on BBC Sounds: bbc.in/3WEQS5W

Mike and Irina Conboy are a couple of tie-dye clad scientists in the bio-engineering department at the University of Berkeley. When they started researching ageing more than 20 years ago at Stanford, the field was nothing more than a spin-off from geroscience - most of their time at the lab bench was spent documenting signs and signals that our bodies are reaching their ends.

But in 2005, they published an article in Science that suggested there is hope for reversing ageing our tired old bodies. And the best bit of their study was that they proved there’s ample supply of the base material to do it - young blood. Using a revolutionary but ancient technique, their results re-ignited the millennia-old search for life everlasting.

In this series, technology reporter and psychologist Aleks Krotoski explores the frontiers of the extreme longevity pioneers. They've made their money in Silicon Valley. And with their technology solutions - PayPal, Facebook, cryptocurrencies - they've ushered in the world that we live in today, with all its unintended consequences. Some of them now want to solve the "problem" of aging, or even death, and they are making bigger strides than we may think.

Can they? Should they?

A Pillowfort production for BBC Radio 4

New episodes released Mondays. If you're in the UK, listen to the full series of Intrigue: The Immortals first on BBC Sounds: bbc.in/3WEQS5W

Over the last 100 years, we’ve seen global life expectancy double. Could it happen again?

Technology reporter and psychologist Aleks Krotoski explores the frontiers of the extreme longevity pioneers. They've made their money in Silicon Valley. And with their technology solutions - PayPal, Facebook, cryptocurrencies - they've ushered in the world that we live in today, with all its unintended consequences. Some of them now want to solve the "problem" of aging, or even death, and they are making bigger strides than we may think.

Can they? Should they?

Bryan Johnson is a technology success story. In 2013, he sold his company to PayPal for $400 million, and now spends his time - and $2m annually - on the search for eternal life. He believes he has found the secret - or, at least, can find it in the thousands of scientific articles he and his team sift through for their protocol of treatments. The most unusual of which is infusing Bryan’s veins with the plasma of young people.

Has he discovered the fountain of youth?

A Pillowfort production for BBC Radio 4

New episodes released Mondays. If you're in the UK, listen to the full series of Intrigue: The Immortals first on BBC Sounds: bbc.in/3WEQS5W

Over the last 100 years, we’ve seen global life expectancy double. Could it happen again? In The Immortals, technology reporter and psychologist Aleks Krotoski explores the frontiers of the extreme longevity pioneers.

They've made their money in Silicon Valley. And with their technology solutions they've ushered in the world that we live in today. Some of them now want to solve the problem of aging - or even death itself - and they are making bigger strides than we may think. Can they? Should they?

A Pillowfort production for BBC Radio 4

The K-pop stars are jailed for their crimes and some women hope this and other sex abuse scandals might finally spark a real social change. Instead, all it does is fan the growing divisions between men and women. Then the gender war goes mainstream and plays out during the recent presidential election.

For the first time, we give the definitive account of the sex scandals that brought down some of Korea’s biggest K-pop stars. It’s a tale of depravity, power and excess - hidden behind a facade of wholesome pop music.

Co-creator, presenter and writer: Chloe Hadjimatheou

ACTORS

Journalist Kang receives a surprising call from K-pop royalty Goo-Hara, who wants to help her with her investigation, as some of the people in the chatroom were her friends. Goo Hara, like many South Korean women is a victim of digital sex crime. Her very public battle in taking a stand against it, receives enormous coverage into her private life and she is mercilessly trolled. It’s too much for her, and will end in tragedy.

For the first time, we give the definitive account of the sex scandals that brought down some of Korea's biggest K-pop stars. It’s a tale of depravity, power and excess - hidden behind a facade of wholesome pop music.

Co-creator, presenter and writer: Chloe Hadjimatheou

ACTORS

The scandals are making headlines around the world ánd K-pop fans react. Jung’s superfan watches as one after another K-pop star is arrested. She has had enough and becomes part of a feminist movement for change against spy cam crimes and misogyny. The woman who made the original allegation against Jung says she regrets not pursuing it. She was viciously trolled after her accusation, and she campaigns to make sure this never happens again to another woman who dares to speak out.

For the first time, we give the definitive account of the sex scandals that brought down some of Korea’s biggest K-pop stars. It’s a tale of depravity, power and excess - hidden behind a facade of wholesome pop music.

Co-creator, presenter and writer: Chloe Hadjimatheou

ACTORS

A rival broadcaster reveals a shocking scandal at the exclusive Burning Sun nightclub, co-owned by Seungri – one of the members of Big Bang, and a global K-pop star. There are disturbing accounts emerging of underground rooms where women are taken, and the police investigate. And Journalist Kang is about to drop a bombshell.

For the first time, we give the definitive account of the sex scandals that brought down some of Korea’s biggest K-pop stars. It’s a tale of depravity, power and excess - hidden behind a facade of wholesome pop music.

Co-creator, presenter and writer: Chloe Hadjimatheou

ACTORS

Someone is holding popstar Jung’s phone in their hands. And what they see on it is shocking. Another journalist Kang Kyung-Yoon gets a tip-off and starts investigating the chat-rooms, and is overwhelmed by the crimes she sees. Sex videos being shared by well-known celebrities, and in some the women are unconscious and being sexually assaulted. She tracks down some of the victims, and the more she digs, the more she uncovers.

For the first time, we give the definitive account of the sex scandals that brought down some of Korea’s biggest K-pop stars. It’s a tale of depravity, power and excess - hidden behind a facade of wholesome pop music.

Co-creator, presenter and writer: Chloe Hadjimatheou