Table: tv_episode_data_12
Columns: series
season
title
directed_by
written_by
original_air_date

Question: Who wrote season 10
SQL: SELECT "written_by" FROM tv_episode_data_12 WHERE "season" = 10

Question: Name who directed the episode by joe sachs and david zabel
SQL: SELECT "directed_by" FROM tv_episode_data_12 WHERE "written_by" = 'Joe Sachs and David Zabel'