Table: episodes_table_25
Columns: no
col
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_million

Question: who are the writers of the episode that had 3.07 millions of North American spectators?
SQL: SELECT "written_by" FROM episodes_table_25 WHERE "u_s_viewers_million" = '3.07'

Question: what is the biggest series episode number whose production code is 2t7211?
SQL: SELECT MAX("no") FROM episodes_table_25 WHERE "production_code" = '2T7211'

Question: what is the smallest series episode number whose production code is 2t7211?
SQL: SELECT MIN("no") FROM episodes_table_25 WHERE "production_code" = '2T7211'

Question: when was the premiere of the episode where the amount of North American spectators was 1.76 millions?
SQL: SELECT "original_air_date" FROM episodes_table_25 WHERE "u_s_viewers_million" = '1.76'