What is the series number for season episode 24?
CREATE TABLE "season_two_1999_2000" (
  "series_number" real,
  "season_number" real,
  "episode_title" text,
  "premiere_date" text,
  "production_code" real
);
SELECT MIN("series_number") FROM "season_two_1999_2000" WHERE "season_number"=24;