Table: tv_episode_data_134
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_million

Question: What was the production code of the episode no. 55 in the series?
SQL: SELECT "production_code" FROM tv_episode_data_134 WHERE "no_in_series" = 55

Question: What was the production code of the episode with an audience of 14.79 million in the US?
SQL: SELECT "production_code" FROM tv_episode_data_134 WHERE "u_s_viewers_million" = '14.79'

Question: Who directed the episode with an audience of 14.11 million?
SQL: SELECT "directed_by" FROM tv_episode_data_134 WHERE "u_s_viewers_million" = '14.11'

Question: What was the title of the episode with a production code of 3x6404?
SQL: SELECT "title" FROM tv_episode_data_134 WHERE "production_code" = '3X6404'