CREATE TABLE "table1_18367694_2" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);

Question: What is the original air date of the episode with the production code 1115? 
SQL: SELECT "original_air_date" FROM "table1_18367694_2" WHERE "production_code"=1115;

Question: who directed the episode with the original air date of November 22, 1989? 
SQL: SELECT "directed_by" FROM "table1_18367694_2" WHERE "original_air_date"='November 22, 1989';