Table: tv_episodes_6
Columns: no_in_series
no_in_season
title
directed_by
written_by
featured_character_s
original_air_date
u_s_viewers_million

Question: What are the episode numbers where the episode features Jack & Locke?
SQL: SELECT "no_in_series" FROM tv_episodes_6 WHERE "featured_character_s" = 'Jack & Locke'

Question: What are the episode numbers of episodes featuring Hurley?
SQL: SELECT "no_in_series" FROM tv_episodes_6 WHERE "featured_character_s" = 'Hurley'

Question: List the episode whose number in the series is 111.
SQL: SELECT "no_in_season" FROM tv_episodes_6 WHERE "no_in_series" = '111'