CREATE TABLE "table1_19229713_6" (
  "no" real,
  "num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_million" text
);

Question: When did the title "secret weapons" originally air?
SQL: SELECT "original_air_date" FROM "table1_19229713_6" WHERE "title"='\"Secret Weapons\"';

Question: How many u.s. viewers (million) have the number 16?
SQL: SELECT "u_s_viewers_million" FROM "table1_19229713_6" WHERE "num"=16;

Question: What is the production code of the title "secret weapons"?
SQL: SELECT "production_code" FROM "table1_19229713_6" WHERE "title"='\"Secret Weapons\"';

Question: How many u.s. viewers  (million) have the production code of 5.09?
SQL: SELECT "u_s_viewers_million" FROM "table1_19229713_6" WHERE "production_code"='5.09';