Table: episodes_30
Columns: no
col
title
directed_by
written_by
u_s_air_date
production_code
u_s_viewers_million

Question: Who are the writers of the episodes directed by Justin Hartley?
SQL: SELECT "written_by" FROM episodes_30 WHERE "directed_by" = 'Justin Hartley'

Question: On which date did episode # 18 air in the U.S.?
SQL: SELECT "u_s_air_date" FROM episodes_30 WHERE "col" = 18

Question: How many million U.S. viewers watched the episode with the production code 3x6004?
SQL: SELECT "u_s_viewers_million" FROM episodes_30 WHERE "production_code" = '3X6004'

Question: List the titles of episodes written by Anne Cofell Saunders.
SQL: SELECT "title" FROM episodes_30 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 episodes_30 WHERE "directed_by" = 'Christopher Petry' AND "production_code" = '3X6006'