What is the first number in series that had the production code 1ACX03?
CREATE TABLE "table1_14724369_1" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text
);
SELECT MAX("no_in_series") FROM "table1_14724369_1" WHERE "production_code"='1ACX03';