Table: tv_episode_details_3
Columns: col
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_million

Question: What day did episode number 4 air originally?
SQL: SELECT "original_air_date" FROM tv_episode_details_3 WHERE "col" = 4

Question: Who wrote the episode with 8.61 million U.S. viewers?
SQL: SELECT "written_by" FROM tv_episode_details_3 WHERE "u_s_viewers_million" = '8.61'

Question: What date did the episode with 8.61 million U.S. viewers originally air?
SQL: SELECT "original_air_date" FROM tv_episode_details_3 WHERE "u_s_viewers_million" = '8.61'

Question: What is the name of the episode that had 9.89 million U.S. viewers?
SQL: SELECT "title" FROM tv_episode_details_3 WHERE "u_s_viewers_million" = '9.89'