Table: tv_episodes_26
Columns: no_by_series
no_by_season
title
directed_by
written_by
original_air_date
production_number
u_s_viewers_in_millions

Question: Who directed episode 21?
SQL: SELECT "directed_by" FROM tv_episodes_26 WHERE "no_by_season" = 21

Question: What is the series number of the episode "Pandora"?
SQL: SELECT "no_by_series" FROM tv_episodes_26 WHERE "title" = '"Pandora"'

Question: What episode was watched by 10.81 million US viewers?
SQL: SELECT MIN("no_by_season") FROM tv_episodes_26 WHERE "u_s_viewers_in_millions" = '10.81'

Question: How many episodes are titled "Cops & Robbers"?
SQL: SELECT COUNT("no_by_season") FROM tv_episodes_26 WHERE "title" = '"Cops & Robbers"'

Question: What episode is directed by Bryan Spicer and written by Terence Paul Winter?
SQL: SELECT "title" FROM tv_episodes_26 WHERE "directed_by" = 'Bryan Spicer' AND "written_by" = 'Terence Paul Winter'