which number lists the production code as 2j5809
CREATE TABLE "table1_27403436_1" (
  "no" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_million" text
);
SELECT "no" FROM "table1_27403436_1" WHERE "production_code"='2J5809';