Tonight: an attack by an armed gang on a couple in Cowdenbeath, Fife, one night last December. Among the clues that the police hope will jog someone's memory are the northern English accents of the robbers and the white transit van and red Ford Escort they used. Crimewatch UK also reconstructs the murder of Doris Shelley two months ago. She lived alone in a 17th-century mill house in Suffolk and a man had been seen on two occasions hiding in her garden.