Table: tv_episodes_3
Columns: series
episode
title
directed_by
written_by
original_air_date

Question: Who directed Episode 8?
SQL: SELECT "directed_by" FROM tv_episodes_3 WHERE "episode" = 8

Question: Who directed the episode called "Tell-tale Heart"?
SQL: SELECT "directed_by" FROM tv_episodes_3 WHERE "title" = '"Tell-Tale Heart"'

Question: What was the original air date for Series 36?
SQL: SELECT "original_air_date" FROM tv_episodes_3 WHERE "series" = 36

Question: Who wrote Series 38?
SQL: SELECT "written_by" FROM tv_episodes_3 WHERE "series" = 38