Table: tv_series_episodes
Columns: no_in_series
title
directed_by
written_by
original_air_date
production_code

Question: What is the original air date of the episode with the production code 1115? 
SQL: SELECT "original_air_date" FROM tv_series_episodes WHERE "production_code" = 1115

Question: who directed the episode with the original air date of November 22, 1989? 
SQL: SELECT "directed_by" FROM tv_series_episodes WHERE "original_air_date" = 'November 22, 1989'