CREATE TABLE "season_3_2012" (
  "no" real,
  "num" real,
  "title" text,
  "directed_by" text,
  "story_by" text,
  "teleplay_by" text,
  "original_air_date" text,
  "u_s_viewers_millions" text
);

Question: Who directed the episode that had 0.54 million U.S. viewers? 
SQL: SELECT "directed_by" FROM "season_3_2012" WHERE "u_s_viewers_millions"='0.54';

Question: Who wrote the teleplay for the episode directed by Tim Robbins? 
SQL: SELECT "teleplay_by" FROM "season_3_2012" WHERE "directed_by"='Tim Robbins';

Question: Who directed the episode that had 0.57 million U.S. viewers? 
SQL: SELECT "directed_by" FROM "season_3_2012" WHERE "u_s_viewers_millions"='0.57';

Question: What number episode in the season was watched by 0.49 million U.S. viewers? 
SQL: SELECT MAX("num") FROM "season_3_2012" WHERE "u_s_viewers_millions"='0.49';