The final episode in the conspiracy thriller by Matthew Broughton. Starring Romola Garai. Written by Matthew Broughton. Helen and Freddy fly to Shanghai to discover the secret of 'life without end'. But Helen fears that she'll actually find the worst thing in the world. Who is the mysterious Doctor Fisker Lee? What procedure did he carry out on the boy from the plane crash? And what secrets lie within the vaults of his private research hospital? Tracks: A story in nine parts about life, death and the human brain. Directed in Wales by James Robinson.