Table: tv_episodes_8
Columns: col
col_2
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_millions

Question: Who wrote the episode which was directed by Nick Marck?
SQL: SELECT "written_by" FROM tv_episodes_8 WHERE "directed_by" = 'Nick Marck'

Question: What is the season 4 # for the production code of 4abb07?
SQL: SELECT "col_2" FROM tv_episodes_8 WHERE "production_code" = '4ABB07'

Question: What is the title of episode No. 65?
SQL: SELECT "title" FROM tv_episodes_8 WHERE "col" = 65

Question: What is the production code for the episode with 5.5 million u.s. viewers?
SQL: SELECT "production_code" FROM tv_episodes_8 WHERE "u_s_viewers_millions" = '5.5'

Question: What is the series No when the season 4 # is 18?
SQL: SELECT MIN("col") FROM tv_episodes_8 WHERE "col_2" = 18