CREATE TABLE "table1_25679312_2" (
  "series_num" real,
  "episode_title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "prod_code" real
);

Question: Who directed the episode with the production code 10?
SQL: SELECT "directed_by" FROM "table1_25679312_2" WHERE "prod_code"=10;

Question: Who wrote the episode with production code 2?
SQL: SELECT "written_by" FROM "table1_25679312_2" WHERE "prod_code"=2;

Question: Who wrote the episode with production code 5?
SQL: SELECT "written_by" FROM "table1_25679312_2" WHERE "prod_code"=5;