SELECT "Written by" FROM table_27069 WHERE "Directed by" = 'Patrick Duffy' AND "Original air date" = 'November 7, 1997'
Name who wrote the episode directed by patrick duffy airing on november 7, 1997
CREATE TABLE table_27069 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" real
)