Table: tv_episodes_21
Columns: series
season
episode_title
written_by
directed_by
u_s_viewers_millions
original_air_date

Question: How many u.s. viewers (million) have a series # 83?
SQL: SELECT "u_s_viewers_millions" FROM tv_episodes_21 WHERE "series" = 83

Question: How many u.s. viewers (millions) have 5 as the season #?
SQL: SELECT "u_s_viewers_millions" FROM tv_episodes_21 WHERE "season" = 5

Question: How many written by have wendey stanzler as the director?
SQL: SELECT COUNT("written_by") FROM tv_episodes_21 WHERE "directed_by" = 'Wendey Stanzler'

Question: What is the original air date where tracy poust & jon kinnally was written by?
SQL: SELECT "original_air_date" FROM tv_episodes_21 WHERE "written_by" = 'Tracy Poust & Jon Kinnally'

Question: Who is the written by when mark worthington is the director?
SQL: SELECT "written_by" FROM tv_episodes_21 WHERE "directed_by" = 'Mark Worthington'