CREATE TABLE "season_12_1966_67" (
  "series_num" real,
  "season_num" real,
  "title" text,
  "director" text,
  "writer_s" text,
  "airdate" text
);

Question: What is the lowest season #?
SQL: SELECT MIN("season_num") FROM "season_12_1966_67";

Question: Who directed  series # 422?
SQL: SELECT "director" FROM "season_12_1966_67" WHERE "series_num"=422;

Question: How many directors were there for series # 431?
SQL: SELECT COUNT("director") FROM "season_12_1966_67" WHERE "series_num"=431;

Question: Who directed the episode with a title of " old friend "?
SQL: SELECT "director" FROM "season_12_1966_67" WHERE "title"='\" Old Friend \"';