Table: tv_episode_viewers_2
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
u_s_viewers_million

Question: how many episodes in the serie were title "the key"
SQL: SELECT COUNT("no_in_series") FROM tv_episode_viewers_2 WHERE "title" = '"The Key"'

Question: what is the name of the episode directed by james bobin
SQL: SELECT "title" FROM tv_episode_viewers_2 WHERE "directed_by" = 'James Bobin'

Question: who directed the episode that have 0.25 million u.s viewers
SQL: SELECT "directed_by" FROM tv_episode_viewers_2 WHERE "u_s_viewers_million" = '0.25'