CREATE TABLE "table1_23242933_2" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_millions" text
);

Question: Who wrote the episode with production code 1AJN05?
SQL: SELECT "written_by" FROM "table1_23242933_2" WHERE "production_code"='1AJN05';

Question: How many different series numbers are there for the episode seen by 7.84 million people in the US?
SQL: SELECT COUNT("no_in_series") FROM "table1_23242933_2" WHERE "u_s_viewers_millions"='7.84';

Question: How many millions of people in the US saw the episode titled "Francine's Flashback"?
SQL: SELECT "u_s_viewers_millions" FROM "table1_23242933_2" WHERE "title"='\"Francine''s Flashback\"';

Question: What's the series number of the episode written by Dan Vebber?
SQL: SELECT MAX("no_in_series") FROM "table1_23242933_2" WHERE "written_by"='Dan Vebber';

Question: How many different titles are there of episodes that have been seen by 7.84 million people in the US/
SQL: SELECT COUNT("title") FROM "table1_23242933_2" WHERE "u_s_viewers_millions"='7.84';

Question: When did 6.09 million people in the US see the original airing of an episode of the show?
SQL: SELECT "original_air_date" FROM "table1_23242933_2" WHERE "u_s_viewers_millions"='6.09';