The fourth in a major new nine-part conspiracy thriller, starring Romola Garai. Written by Matthew Broughton Determined to discover who's responsible for the plane crash, Helen continues her search for her father. But when child services become involved, new information points Helen in the direction of the Iraq war. How is Florian connected to the little boy in the coma? And have Helen and Freddy been chasing the wrong lead? Tracks: A story in nine parts about life, death and the human brain. Original music by Stu Barker Directed in Wales by Helen Perry.