CREATE TABLE "table1_2430014_9" (
  "series_no" real,
  "episode_no" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "uk_ratings_bbc2_rank" text,
  "original_air_date" text
);

Question: Name the least series number
SQL: SELECT MIN("series_no") FROM "table1_2430014_9";