CREATE TABLE "table1_17625876_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);

Question: Name the original air date for number in season being 1
SQL: SELECT "original_air_date" FROM "table1_17625876_1" WHERE "no_in_season"=1;