The team are losing morale: it's highly unlikely Minstead Man will appear again after such a close call, and the surveillance may be cut short before they can catch their culprit.

The Force Tasking Group must decide whether to fund Colin's high stakes gamble. Not only is it expensive, but there's absolutely no guarantee it will work.

On 19th August 2004 French student Amelie Delagrange is found on Twickenham Green with fatal head injuries. Detective Chief Inspector Colin Sutton is tasked with leading the investigation. There is no forensic evidence from the attacker at the crime scene, and no apparent motive. But there has been a spate of similar violent attacks on young women in the area.

Colin Sutton and his team are trying to identify the white van they have discovered from an extensive trawl of CCTV images. But there are 25,000 possible vans that need to be checked and eliminated.