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. 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

You can listen to The Trip: 6. Critical periods online on Radio and Podcast. Open the player on this page to stream the available audio.

The Trip: 6. Critical periods is an episode from Understand: The Economy by BBC.

This episode is 15:27 long.

This episode was published on Aug 18, 2025.

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