Table: brothers_sisters_season2_episodes
Columns: episode_number_production_number
title
original_airing
rating
share
rating_share_18_49
total_viewers_in_millions

Question: what is the episode title on original air date of September 30, 2007?
SQL: SELECT "title" FROM brothers_sisters_season2_episodes WHERE "original_airing" = 'September 30, 2007'

Question: What is the rating if the rating/share (18-49) is 3.6?
SQL: SELECT "rating" FROM brothers_sisters_season2_episodes WHERE "rating_share_18_49" = '3.6'

Question: What is the rating/share total number if the total viewers is 12.75 million?
SQL: SELECT COUNT("rating_share_18_49") FROM brothers_sisters_season2_episodes WHERE "total_viewers_in_millions" = '12.75'

Question: If the rating is 9.1, what was the total viewers?
SQL: SELECT "total_viewers_in_millions" FROM brothers_sisters_season2_episodes WHERE "rating" = '9.1'