Richard Goulding concludes Cynan Jones' electrifying series set in the very near future - a future a little, but not quite like our own. Water is scarce and the Water Train that feeds the city is increasingly at risk of sabotage. And out in the field beyond the city stands police marksman, John Branner - his job is to protect the train. But as the train advances, a light flickers on his scanner... What or who is out there? Reader: Richard Goulding Writer: Cynan Jones Producer: Justine Willett Music: Original music by Kirsten Morrison