CREATE TABLE "table1_2453243_4" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);

Question: When "sheep thrills" is the title what is the air date?
SQL: SELECT "original_air_date" FROM "table1_2453243_4" WHERE "title"='\"Sheep Thrills\"';