Table: gunsmoke_episodes
Columns: series
season
title
director
writer_s
airdate

Question: What is the lowest season #?
SQL: SELECT MIN("season") FROM gunsmoke_episodes

Question: Who directed  series # 422?
SQL: SELECT "director" FROM gunsmoke_episodes WHERE "series" = 422

Question: How many directors were there for series # 431?
SQL: SELECT COUNT("director") FROM gunsmoke_episodes WHERE "series" = 431

Question: Who directed the episode with a title of " old friend "?
SQL: SELECT "director" FROM gunsmoke_episodes WHERE "title" = '" Old Friend "'