Name the production code for november 27, 1988
CREATE TABLE "table1_2226817_4" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text
);
SELECT "production_code" FROM "table1_2226817_4" WHERE "original_air_date"='November 27, 1988';