Name who wrote the episode directed by patrick duffy airing on november 7, 1997
CREATE TABLE "table1_2468961_8" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT "written_by" FROM "table1_2468961_8" WHERE "directed_by"='Patrick Duffy' AND "original_air_date"='November 7, 1997';