CREATE TABLE "table1_25830834_2" (
  "series_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_million" text
);

Question: What is the series # of "tanarak"?
SQL: SELECT MIN("series_num") FROM "table1_25830834_2" WHERE "title"='\"Tanarak\"';

Question: Who wrote the episode with the production code 2j5153?
SQL: SELECT "written_by" FROM "table1_25830834_2" WHERE "production_code"='2J5153';