Table: tv_episode_20
Columns: season
series
episode_title
original_air_date
nick_prod

Question: When did the episode originally air with a nick production number of 945?
SQL: SELECT "original_air_date" FROM tv_episode_20 WHERE "nick_prod" = 945

Question: What was the latest season with a nick production number of 942?
SQL: SELECT MAX("season") FROM tv_episode_20 WHERE "nick_prod" = 942