Near-death experiences have produced strikingly similar reports across cultures for decades: tunnels of light, out-of-body views of resuscitation rooms, a sense of overwhelming peace. This BBC production puts the leading researchers on camera to test those reports against the evidence, including Peter Fenwick, Pim van Lommel, and Bruce Greyson, whose long-running studies of cardiac arrest survivors sit at the center of the debate over whether consciousness can outlast a flatlined brain. Case studies are worked through in detail, with skeptics and believers given equal time to challenge or defend each account, and footage from actual clinical research illustrates how scientists have tried to measure something that resists measurement. Van Lommel's Dutch hospital studies and Fenwick's work with UK patients anchor the argument for a real, unexplained phenomenon, while critics offer physiological explanations involving oxygen deprivation and brain chemistry. The film does not resolve the question of what NDEs prove about mind and afterlife, but it lays out the strongest evidence and the strongest objections side by side.