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.

Cast: Martin Clunes, Katie Lyons, Claudie Blakley, Peter Forbes, Stephen Wight, Steve Furst, Jay Taylor, Steffan Rhodri, James Puddephatt, Philip McGinley, Stephane Cornicard, Michèle Belgrand, Nicholas Burns, Howard Ward, Cornelius Booth