What is the series number for the episode directed by  jay sandrich that aired October 23, 1986?
CREATE TABLE "table1_2818164_4" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT MIN("no_in_series") FROM "table1_2818164_4" WHERE "directed_by"='Jay Sandrich' AND "original_air_date"='October 23, 1986';