Table: episodes_18
Columns: season
episode
title
director_s
writer_s
original_air_date

Question: When was the episode number 2 originally aired?
SQL: SELECT "original_air_date" FROM episodes_18 WHERE "episode" = 2

Question: When was the episode titled "The Parachute of Healing" originally aired?
SQL: SELECT "original_air_date" FROM episodes_18 WHERE "title" = '"The Parachute of Healing"'

Question: Who was the writer of the episode titled "The Parachute of Healing"?
SQL: SELECT "writer_s" FROM episodes_18 WHERE "title" = '"The Parachute of Healing"'

Question: What was the highest season number?
SQL: SELECT MAX("season") FROM episodes_18