In 2020, a curious trend went viral on social media, especially among teenagers and young adults. As much of the world stayed at home to curb the spread of COVID-19, Reality Shifters began claiming they could move from one reality to another, referencing multiverse theory.

Beyond the actual possibility of switching between realities, this craze raised intriguing questions about the fabric of the reality we experience. Philosophers and scientists have long speculated about the existence of multiple realities. Today, Matthew Syed explores the blurry line between what we perceive as reality and what may lie beyond it, inviting us to question the very nature of existence.

With Reality Shifter Kristin Dattoo, clinical psychologist Professor Eli Somer, neuroscientist Professor Anil Seth, and theoretical physicist Professor Ulf Danielsson.

Presenter: Matthew Syed Producer: Julien Manuguerra-Patten Series Editors: Georgia Moodie and Max O'Brien Sound Design and Mix: Daniel Kempson Theme music by Ioana Selaru A Novel production for BBC Radio 4