The eighth episode of a nine-part conspiracy thriller, starring Romola Garai. Written by Matthew Broughton. When the mysterious child, K, wakes from his coma, Helen discovers his identity. And after she finally tracks down the pilot of the plane that crashed, the truth of what happened to flight 259 begins to emerge. Will Helen help K return to his family? And what secrets lie hidden in Florian's water-damaged notebook? Tracks: A story in nine parts about life, death and the human brain. Directed in Wales by James Robinson.