. . "Christopher Wray (8th March 1940-12th September 2014) is a British actor who played PC Dave Ball between November 1972 and January 1973. He also appeared in Z Cars, Doctor Who and Upstairs, Downstairs before pursuing his career with the 'Christopher Wray Lighting Emporium'."@en . . . "Wray's other television appearances include roles on Dixon of Dock Green, Z-Cars, The Plane Makers, Upstairs, Downstairs, No Hiding Place, The Wednesday Play and Emmerdale."@en . . . "Christopher Wray"@en . "Wray's other television appearances include roles on Dixon of Dock Green, Z-Cars, The Plane Makers, Upstairs, Downstairs, No Hiding Place, The Wednesday Play and Emmerdale."@en . . "Christopher Wray (8th March 1940-12th September 2014) is a British actor who played PC Dave Ball between November 1972 and January 1973. He also appeared in Z Cars, Doctor Who and Upstairs, Downstairs before pursuing his career with the 'Christopher Wray Lighting Emporium'."@en .