First broadcast 6th/7th January 2015.
Three people, the Lakhanis, an Indian couple, and an employee are shot dead by a long range sniper on a garage forecourt - a seemingly motiveless crime.
Emilia Fox - Dr. Nikki Alexander
David Caves - Jack Hodgson
Richard Lintern - Dr. Thomas Chamberlain
Robin Berry - Mark
Paul Blackwell - Police officer
Sian Breckin - DC Gabby Lawson
Martin Campbell - Alain Gontrard
Liz Carr - Clarissa Mullery
Phil Cheadle - Conrad Devenish
Andrew Cooper - Joshua
Simon Darwen - Journalist
Simon Desborough - Host
Patrick Driver - Alec Smithson
Brian Duffy - Andrew
Kathleen Fraser - Bertha
Sean Gilder - Jim Clout
Richard Herdman - Police Officer
Veejay Kaur - Andrea Lakhani
Stuart Laing - Martin Cross
Sam Lathem - Duty Sergeant
Sarah MacRae - Kate Hulton
Leemore Marrett Jr. - DC Howard Stent
Matthew David McCarthy - CID Officer
Jayne McKenna - Julia Chamberlain
Yvonne O'Grady - Mary
Jenny Ogilvie - Sheila Cross
James Phelps - Chris
Daniel Qureshi - Steven Lakhani
Simon Snashall - Graham
Zoe Telford - DCI Jane De Freitas
Steve Wall - CS Robert Drake
Mabel Watson - Rosie Chamberlain
Adam Wilson - Craig Cross
Philip Wright - Ian Cross
Max Wrottesley - Adrian
Chris Cowlin - Police Officer
Karlie Kloss - Pedestrian #2
Sean Gilder - Jim Clout
Sam Lathem - Duty Sergeant
Edmond Moulton - Young Luke
