Table: tv_episode_data_124
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_millions

Question: who directed the episode that elaine ko wrote?
SQL: SELECT "directed_by" FROM tv_episode_data_124 WHERE "written_by" = 'Elaine Ko'

Question: when was the episode with production code "2arg01" originally aired?
SQL: SELECT "original_air_date" FROM tv_episode_data_124 WHERE "production_code" = '2ARG01'

Question: what is the title of the episode with production code "2arg09"?
SQL: SELECT "title" FROM tv_episode_data_124 WHERE "production_code" = '2ARG09'

Question: when was the episode with production code "2arg24" originally aired?
SQL: SELECT "original_air_date" FROM tv_episode_data_124 WHERE "production_code" = '2ARG24'