Table: tv_episode_data_29
Columns: no_in_series
no_in_season
title
director
writer_s
original_air_date
production_code
u_s_viewers_million

Question: What is the production code when the u.s. viewers (million) is 11.76?
SQL: SELECT "production_code" FROM tv_episode_data_29 WHERE "u_s_viewers_million" = '11.76'

Question: What was the u.s. viewers (millions) when the production code was 4alh19?
SQL: SELECT "u_s_viewers_million" FROM tv_episode_data_29 WHERE "production_code" = '4ALH19'