In the tradition of great screen con men -- one of the few with a visible tail -- Top Cat holds a top spot in the hearts of cartoon fans. The smooth-talking New York City cat, known as T.C. to his kitty cohorts Benny the Ball, Choo-Choo, Spook, The Brain and Fancy-Fancy, is always on the make toward a big score or swindle. And the bothersome -- and ever exasperated -- Officer Dibble is relentlessly on his case (although always one step