CREATE TABLE "table1_23399481_2" (
  "series_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "u_s_viewers_in_millions" text
);

Question: What is the original air date of the episode that was directed by David Paymer?
SQL: SELECT "original_air_date" FROM "table1_23399481_2" WHERE "directed_by"='David Paymer';

Question: If the amount of U.S. viewers is 2.14 million, who was the episode directed by?
SQL: SELECT "directed_by" FROM "table1_23399481_2" WHERE "u_s_viewers_in_millions"='2.14';

Question: If the amount of U.S. viewers is 2.05 milliom, who was the episode directed by?
SQL: SELECT "directed_by" FROM "table1_23399481_2" WHERE "u_s_viewers_in_millions"='2.05';

Question: What is the director name is the U.S. viewers is 2.22 million?
SQL: SELECT "directed_by" FROM "table1_23399481_2" WHERE "u_s_viewers_in_millions"='2.22';