Name the number in series for production code being 204
CREATE TABLE "table1_25810656_3" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT "no_in_series" FROM "table1_25810656_3" WHERE "production_code"=204;