CREATE TABLE "table1_12564633_1" (
  "series_num" real,
  "season_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text
);

Question: What is the name of Season #15?
SQL: SELECT "title" FROM "table1_12564633_1" WHERE "season_num"=15;

Question: What is the series number for Season #18?
SQL: SELECT MIN("series_num") FROM "table1_12564633_1" WHERE "season_num"=18;

Question: What was the first series in this list that Jack Orman wrote?
SQL: SELECT MIN("series_num") FROM "table1_12564633_1" WHERE "written_by"='Jack Orman';

Question: What date did the episode called "Responsible Parties" air on?
SQL: SELECT "original_air_date" FROM "table1_12564633_1" WHERE "title"='\"Responsible Parties\"';

Question: What is the name of the episode that Richard Thorpe directed?
SQL: SELECT "title" FROM "table1_12564633_1" WHERE "directed_by"='Richard Thorpe';