Table: melrose_episodes_3
Columns: no_in_series
no_in_season
title
director
writer_s
original_air_date
production_code

Question: who directed the production code 2398204
SQL: SELECT "director" FROM melrose_episodes_3 WHERE "production_code" = '2398204'

Question: when did "unpleasantville" air?
SQL: SELECT "original_air_date" FROM melrose_episodes_3 WHERE "title" = '"Unpleasantville"'