Table: tv_episode_data_12
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 with production code 4akj08?
SQL: SELECT "directed_by" FROM tv_episode_data_12 WHERE "production_code" = '4AKJ08'

Question: Who directed the episode with production code 4akj01?
SQL: SELECT "directed_by" FROM tv_episode_data_12 WHERE "production_code" = '4AKJ01'