The fourth of these Edwardian tintypes and perhaps the one most suited, so far, to the Masterpiece Theater audience rather than to American kids. The ""Season"" on view is the Social Season starting--as the introductory note explains--""with the Private View at the Royal Academy of Arts""; and continuing, picture-spread by picture-spread, with balls, theatrical performances, regattas, garden parties, horse races, and ceremonious strolls-in-the-park. . . none of which does other than portray a vanished and alien way of life. There's not even an upstairs/downstairs, out-front/ behind-the-scenes contrast to give it some reality or drama. Just lots of fancy people in fancy duds disporting themselves (genteely) on one after another occasion.