CREATE TABLE "table1_26464364_1" (
  "no" real,
  "num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "u_s_air_date" text,
  "production_code" text,
  "u_s_viewers_million" text
);

Question: Who are the writers of the episodes directed by Justin Hartley?
SQL: SELECT "written_by" FROM "table1_26464364_1" WHERE "directed_by"='Justin Hartley';

Question: On which date did episode # 18 air in the U.S.?
SQL: SELECT "u_s_air_date" FROM "table1_26464364_1" WHERE "num"=18;

Question: How many million U.S. viewers watched the episode with the production code 3x6004?
SQL: SELECT "u_s_viewers_million" FROM "table1_26464364_1" WHERE "production_code"='3X6004';

Question: List the titles of episodes written by Anne Cofell Saunders.
SQL: SELECT "title" FROM "table1_26464364_1" WHERE "written_by"='Anne Cofell Saunders';

Question: What is the title of the episode directed by Christopher Petry with the production cod 3x6006?
SQL: SELECT "title" FROM "table1_26464364_1" WHERE "directed_by"='Christopher Petry' AND "production_code"='3X6006';