Table: tv_episodes_25
Columns: no_by_series
title
directed_by
written_by
original_air_date
production_number
u_s_viewers_in_millions

Question: How many different writers have written the episode with series number 8?
SQL: SELECT COUNT("written_by") FROM tv_episodes_25 WHERE "no_by_series" = 8

Question: Who is the director of the episode titled "Hell hath no fury"?
SQL: SELECT "directed_by" FROM tv_episodes_25 WHERE "title" = '"Hell Hath No Fury"'

Question: Who directed the episode titled "Ghosts"?
SQL: SELECT "directed_by" FROM tv_episodes_25 WHERE "title" = '"Ghosts"'

Question: What's the title of the episode with production number 103?
SQL: SELECT "title" FROM tv_episodes_25 WHERE "production_number" = 103

Question: When did the episode titled "Hell hath no fury" air for the first time?
SQL: SELECT "original_air_date" FROM tv_episodes_25 WHERE "title" = '"Hell Hath No Fury"'