How many episode titles have series number 4?
CREATE TABLE "season_1_2003_2004" (
  "series_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT COUNT("title") FROM "season_1_2003_2004" WHERE "series_num"=4;