Table: tv_show_episode_3
Columns: no_in_series
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_million

Question: What episode number in the series was viewed by 13.66 million people in the U.S.?
SQL: SELECT MAX("no_in_series") FROM tv_show_episode_3 WHERE "u_s_viewers_million" = '13.66'

Question: How many million U.S. viewers watched the epiode with a production code of 1arc12?
SQL: SELECT "u_s_viewers_million" FROM tv_show_episode_3 WHERE "production_code" = '1ARC12'

Question: How many million U.S. viewers watched the episode with a production code of 1arc03?
SQL: SELECT "u_s_viewers_million" FROM tv_show_episode_3 WHERE "production_code" = '1ARC03'

Question: How many million U.S. viewers watched episode number 6 in the series?
SQL: SELECT "u_s_viewers_million" FROM tv_show_episode_3 WHERE "no_in_series" = 6

Question: Who directed episode number 18 in the series?
SQL: SELECT "directed_by" FROM tv_show_episode_3 WHERE "no_in_series" = 18