CREATE TABLE "table1_24938621_3" (
  "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: Who wrote "Concordia"?
SQL: SELECT "written_by" FROM "table1_24938621_3" WHERE "title"='\"Concordia\"';

Question: What is the production code of the episode written by Cathryn Humphris?
SQL: SELECT "production_code" FROM "table1_24938621_3" WHERE "written_by"='Cathryn Humphris';

Question: What is the production code of the episode that had 5.43 million viewers?
SQL: SELECT "production_code" FROM "table1_24938621_3" WHERE "u_s_viewers_million"='5.43';

Question: What was the title of the episode directed by Jesse Warn?
SQL: SELECT "production_code" FROM "table1_24938621_3" WHERE "directed_by"='Jesse Warn';

Question: What episode number was written by Gregg Hurwitz?
SQL: SELECT "no" FROM "table1_24938621_3" WHERE "written_by"='Gregg Hurwitz';