Laurie Taylor lifts the lid on a sector of the economy associated with wealth, innovation & genius. Mark Graham, Professor of Internet Geography at the Oxford Internet Institute, uncovers the hidden human labour powering AI. His study, based on hundreds of interviews and thousands of hours of fieldwork, is the first to tell the stories of this army of underpaid and exploited workers. Beneath the promise of a frictionless technology that will bring riches to humanity, the interviews he has conducted reveal a grimmer reality involving a precarious global workforce of millions labouring under often appalling conditions. Also, Paula Bialski, Associate Professor for Digital Sociology at the University of St. Gallen in St. Gallen, Switzerland, discusses her research with software developers at a non-flashy, run-of-the-mill tech company. Beyond the awesome images of the Gods of Silicone Valley, she finds that technology breaks due to human-related issues and staff are often engaged in patch up and repair, rather than dreaming up the next killer app. Producer: Jayne Egerton