What's the title of the episode with a season number 25?
CREATE TABLE "table1_12226390_6" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT "title" FROM "table1_12226390_6" WHERE "no_in_season"=25;