COMEDY Open All Hours Vision, 8 p.m. Many viewers are rediscovering this BBC series that originally aired in fits and starts from 1976 to 1985 on the BBC. Set in the sleepy English town of Doncaster, the show's central character is the miserly shopkeeper Arkwright, played by the late, great Ronnie Barker, whose time is divided between fleecing customers and dodging the efforts of his long-time fianc�e Gladys (Lynda Baron) to get him to walk down the aisle. Also lending capable support is David Jason in the role of Arkwright's beleaguered nephew/employee Granville. And such beautifully unadorned plotlines! Tonight, watch Arkwright squirm when Gladys pressures him to buy a new washing machine.