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BBC Radio 4

NEW in Understand - The Trip

The story of psychedelics. It's a unique moment. After decades of taboo and blanket illegality, policymakers and research institutions are taking these substances seriously. As a new dawn of psychedelic treatment beckons, Tim Hayward makes a personal journey into how we got here and where this is all heading.
 
Understand from BBC Radio 4 - unravelling the complexities of the biggest stories and subjects that really matter right now.

Understand

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states.

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics.

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean.

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

In this episode, we hear from members of the psychedelic community who fear the consequences of plants and fungi that are sacred to some indigenous communities being exploited for commercial gain. This would not be the first time, they say - just look at what happened with tobacco.

Contributors:
Osiris García Cerqueda, historian and sociologist, Program Coordinator, Indigenous Reciprocity Initiative (IRI)
Ariel Clark, lawyer and founding member of the Psychedelic Bar Association
Mike Jay, author and cultural historian

Presenter: Tim Hayward
Series Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass
Written by Tim Hayward and Richard Ward
Sound Design and Mixing: Richard Ward
Researcher: Grace Revill
Production Executive: Lisa Lipman
Commissioning Editor: Daniel Clarke
A Loftus Media production for BBC Radio 4

Audio footage from Psychedelic Science 2023 and 2025 used with permission from the Multidisciplinary Association for Psychedelic Studies (MAPS).

The Trip: 9. Sacred plants for sale

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states.

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics.

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean.

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

In this final episode, Tim explores how much there is still to understand about the therapeutic possibilities of psychedelics and, furthermore, what other insights research might lead us towards. Will curious minds be given the space to roam free? 
 
Contributors:
Lucie Berkovitch, psychiatrist and neuroscientist, GHU Paris Psychiatrie et Neurosciences
Osiris García Cerqueda, historian and sociologist, Program Coordinator, Indigenous Reciprocity Initiative (IRI)
Gül Dölen, neuroscientist, University of California, Berkeley
David Luke, psychologist and psychedelic researcher, University of Greenwich
Andrew Penn, psychiatric nurse practitioner and psychedelics researcher, University of California San Francisco School of Nursing
Peter Sjöstedt-Hughes, philosopher of mind and metaphysics, University of Exeter

Presenter: Tim Hayward
Series Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass
Written by Tim Hayward and Richard Ward
Sound Design and Mixing: Richard Ward
Researcher: Grace Revill
Production Executive: Lisa Lipman
Commissioning Editor: Daniel Clarke
A Loftus Media production for BBC Radio 4

The Trip: 10. Unknown unknowns

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states.

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics.

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean.

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

In this episode, Tim explores the many barriers to researching the potential therapeutic value and other potential applications of psychedelics. He assesses how other countries are weighing up and reacting to the current evidence, and asks if a tipping point may be looming in the UK.

Contributors:
David Luke, psychiatrist and psychedelic researcher, University of Greenwich 
Lauren MacDonald, psychiatrist and psilocybin group facilitator
Jo Neill, professor of psychopharmacology, University of Manchester and Chair of Trustees, Drug Science

Presenter: Tim Hayward
Series Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass
Written by Tim Hayward and Richard Ward
Sound Design and Mixing: Richard Ward
Researcher: Grace Revill
Production Executive: Lisa Lipman 
Commissioning Editor: Daniel Clarke
A Loftus Media production for BBC Radio 4

The Trip: 8. A tipping point?

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states.

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics.

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean. 

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

This episode looks into the history of psychedelic research. From the “dawn” of psychedelic science in 1799 through to prohibition in the second half of the last century, Tim explores shifting cultural and scientific approaches to substances that induce altered states. There had been a willingness to openly explore the trip experience and to see what might be discovered by doing so. Why did all that become taboo?

Contributors:
Erika Dyck, historian of psychedelics, University of Saskatchewan
Mike Jay, author and cultural historian
Peter Sjöstedt-Hughes, philosopher of mind and metaphysics, University of Exeter

Presenter: Tim Hayward
Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass

Written by Tim Hayward and Richard Ward

Sound Design and Mixing: Richard Ward
Production Executive Lisa Lipman 
Researcher: Grace Revill
Commissioning Editor: Daniel Clarke

A Loftus Media production for BBC Radio 4

The Trip: 7. Fascination and taboo

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states.

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics.

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean. 

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

This episode features Dr Gül Dölen who is exploring a possible connection between psychedelic trips and how and when humans learn new things. The implications of her research are potentially ground-breaking.

Contributors:
Eugenia Bone, journalist and author of How to Have a Good Trip
Gül Dölen, neuroscientist, University of California, Berkeley

Presenter: Tim Hayward
Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass
Written by Tim Hayward and Richard Ward 
Sound Design and Mixing: Richard Ward
Production Executive Lisa Lipman 
Researcher: Grace Revill
Commissioning Editor: Daniel Clarke

A Loftus Media production for BBC Radio 4

The Trip: 6. Critical periods

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states. 

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics. 

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean. 

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

In this episode, Tim travels back in time to a Victorian pharmacy, drinks a lot of coffee, uncovers some pioneering psychedelic research in 1950s Canada - and discovers a nurse who was there.

Contributors:
Erika Dyck, historian of psychedelics, University of Saskatchewan
Mike Jay, author and cultural historian
Kay Parley, former nurse Saskatchewan Hospital, Weyburn, Canada
Andrew Penn, psychiatric nurse practitioner and psychedelics researcher, University of California San Francisco School of Nursing

Presenter: Tim Hayward
Series Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass
Written by Tim Hayward and Richard Ward
Sound Design and Mixing: Richard Ward
Researcher: Grace Revill
Voiceover Artist: Sandra-Mae Lux
Special thanks to Zoë Dubus
Commissioning Editor: Daniel Clarke
A Loftus Media production for BBC Radio 4

The Trip: 5. Message in a bottle

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states. 

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics. 

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean. 

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

In this episode, Tim Hayward hears the story of a paramedic who decided to travel abroad in a search for a cure.

Contributors:
John, paramedic practitioner
Katrin Preller, neuropsychologist and neuroimaging researcher, University of Zurich

Presenter: Tim Hayward
Series Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass
Written by Tim Hayward and Richard Ward
Sound Design and Mixing: Richard Ward
Researcher: Grace Revill
Voiceover Artist: Sandra-Mae Lux
Commissioning Editor: Daniel Clarke
A Loftus Media production for BBC Radio 4

The Trip: 4. Looking for a cure

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states. 

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics. 

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean. 

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

In this third episode Tim hears tales of pixies, hyper-intelligent alien entities and explores a highly unusual molecule found in the glands of a toad.

Contributors:
Lisa Luan, neuroscientist and psychologist, Imperial College London
David Luke, psychologist and psychedelic researcher, University of Greenwich
Chris Timmermann, neuroscientist and psychologist, University College London 

Presenter: Tim Hayward
Series Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass
Written by Tim Hayward and Richard Ward
Sound Design and Mixing: Richard Ward
Researcher: Grace Revill
Voiceover Artist: Sandra-Mae Lux
Commissioning Editor: Daniel Clarke
A Loftus Media production for BBC Radio 4

The Trip: 3. Stranger things

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states. 

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics. 

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean. 

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

In this second episode Tim stares at a rose, encounters an inflatable head, and tries to get to grips with the anatomy of a trip.

Contributors:
Eugenia Bone, journalist and author of “How to Have a Good Trip”
Steven A. Jones, filmmaker
Katrin Preller, neuropsychologist and neuroimaging researcher, University of Zurich 

Presenter: Tim Hayward
Series Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass
Written by Tim Hayward and Richard Ward
Sound Design and Mixing: Richard Ward
Researcher: Grace Revill
Voiceover Artist: Sandra-Mae Lux
Commissioning Editor: Daniel Clarke
A Loftus Media production for BBC Radio 4

The Trip: 2. When the drugs take hold

During the early weeks of the pandemic, Tim Hayward spent 14 days in a coma. He remembers this time vividly – his days and nights filled with strange, incandescent visions and hallucinations. That experience is something he would never choose to revisit but, around the world, large numbers of people are deliberately seeking out powerfully altered states. 

In this ten-part series, Tim sets out to better understand a group of substances that induce altered states: psychedelics. 

There’s been a surge of interest in their therapeutic potential for various mental health conditions - as well as a range of other clinical possibilities. As research around the world ramps up after years of taboo and prohibition he tries to get to grips with - or at least get a clearer sense of - how science, culture, politics and business might all interact in this changing psychedelic landscape, and what it all might mean. 

He also explores what might be happening in the brain during a trip and whether, by studying psychedelics, we might uncover more about consciousness, imagination and even the mysteries of reality itself.

In this first episode he discovers where psychedelics come from, gets terrified about ergot poisoning, and hears from a scientist at the forefront of clinical 
research looking at psychedelic-assisted psychotherapy for treatment resistant depression.

Contributors:
Lucie Berkovitch, psychiatrist and neuroscientist, GHU Paris Psychiatrie et Neurosciences
Erika Dyck, historian of psychedelics, University of Saskatchewan
Mike Jay, author and cultural historian
David Luke, psychologist and psychedelic researcher, University of Greenwich

Presenter: Tim Hayward
Series Producer: Richard Ward
Executive Producer: Rosamund Jones
Editor: Kirsten Lass
Written by Tim Hayward and Richard Ward
Sound Design and Mixing: Richard Ward
Researcher: Grace Revill
Voiceover Artist: Sandra-Mae Lux
Commissioning Editor: Daniel Clarke
A Loftus Media production for BBC Radio 4

The Trip: 1. Altered States

When so-called "generative" Artificial Intelligences like Chat GPT and Google's Bard were made available to the public, they made headlines around the world and raised fears about how fast this type of AI was developing. But realistically, what harm could AI do to people? Is it an existential threat, or could it become one? And if things got really bad, couldn't we just switch it off or smash it up with a hammer? 

Technology has already completely altered our lives, and Artificial Intelligence may transform our world to an even greater degree. This series is your chance to get back to basics and really understand key technology terms. What's an algorithm? Where is "the Cloud" and what exactly is Blockchain? What's the difference between machine and deep learning in artificial intelligence, and should we all be using Bitcoin? Our experts will explain in the very simplest terms everything you need to know about the tech that underpins your day. We'll explore the rich history of how all these systems developed, and where they may be going next.

Presenter: Spencer Kelly
Producers: Ravi Naik and Nick Holland 
Editor: Clare Fordham 
Programme Coordinator: Janet Staples

Tech and AI: 10. Can We Control AI?

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