CREATE TABLE "table1_15431251_1" (
  "no_in_season" real,
  "no_disc" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text
);

Question: What is the original air date for episode 17 in the season?
SQL: SELECT "original_air_date" FROM "table1_15431251_1" WHERE "no_in_season"=17;

Question: What is the original air date for the episode directed by Peter Woeste?
SQL: SELECT "original_air_date" FROM "table1_15431251_1" WHERE "directed_by"='Peter Woeste';

Question: What is the title for episode number 7 in the season?
SQL: SELECT COUNT("title") FROM "table1_15431251_1" WHERE "no_in_season"=7;

Question: Who wrote the episode "Forever In A Day"?
SQL: SELECT "written_by" FROM "table1_15431251_1" WHERE "title"='\"Forever in a Day\"';