First broadcast 25th26th September 2004.br br The team investigates the derailment of a train caused by someone leaving Maj. Mark Wiltshire's Land Rover on the tracks.br br Amita Dhiri - Diana Bakerbr Simran Sandhu - Sarah Bakerbr Emma Cunniffe - Rosa Christiebr Danny Webb - Sergeant Paul Bradleybr Emilia Fox - Nikki Alexanderbr William Gaminara - Leo Daltonbr Tom Ward - Dr. Harry Cunninghambr Sean Murray - Joe Mossbr Paul Hilton - William Gouldbr Cordelia Bugeja - Doctor Bennettbr Stephen Boxer - Major Mark Wiltshirebr Shaun Parkes - DI Freemanbr Colin Tierney - Thomas Christiebr Sebastian Hurst-Palmer - Luke Christiebr Robyn Cooper - Alice Christiebr Patricia Kerrigan - Katie Wiltshirebr Michael Webber - Maurice Gartonbr Tony Bluto - Delivery Manbr Talisa Garcia - Suzi Bradleybr Stuart Antony - Markbr Kieran Bew - Stephen Wiltshirebr Kate Bickford - Womanbr Nicholas Hewetson - Peterbr Dave Hill - Mr. Hallbr Eddie Marsan - Derek Poutneybr Jay Martin - Private Vickerybr Benn Northover - Michael Ottybr Clare Wilkie - Emillebr Jane Wood - Mrs.