What was the airdate of the episode of production code 214?
CREATE TABLE "table1_28787871_3" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "original_air_date" text,
  "production_code" real,
  "u_s_viewers_millions" text
);
SELECT "original_air_date" FROM "table1_28787871_3" WHERE "production_code"=214;