CREATE TABLE "table1_25851971_1" (
  "no" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_million" text
);

Question: Who directed the episode with 4.82 million U.S. viewers?
SQL: SELECT "directed_by" FROM "table1_25851971_1" WHERE "u_s_viewers_million"='4.82';

Question: Who directed the episode that had a production code of 2j5457?
SQL: SELECT "directed_by" FROM "table1_25851971_1" WHERE "production_code"='2J5457';

Question: What episode number was written by Anthony Sparks?
SQL: SELECT MIN("no") FROM "table1_25851971_1" WHERE "written_by"='Anthony Sparks';

Question: What was the production code of the episode written by Anthony Sparks?
SQL: SELECT "production_code" FROM "table1_25851971_1" WHERE "written_by"='Anthony Sparks';

Question: What episode number was written by Karin Gist?
SQL: SELECT MAX("no") FROM "table1_25851971_1" WHERE "written_by"='Karin Gist';