Dr Kevin Fong investigates a pioneering technique of extreme cooling that is being used to bring people back from the dead.
In the operating theatre, a patient's heart is stopped and their brain shows no activity. They are indistinguishable from someone who is dead. Yet patients can then be warmed up and brought back to life.
Kevin Fong meets the doctors who have developed this procedure, finds out how it could revolutionise intensive care and trauma medicine, and meets some of the remarkable people who have been brought back from the dead.