CREATE TABLE "table1_21025437_5" (
  "episode_no" real,
  "series_no" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "viewers_millions" text,
  "original_airdate" text
);

Question: Who wrote the episode that had 8.84 million viewers?
SQL: SELECT "written_by" FROM "table1_21025437_5" WHERE "viewers_millions"='8.84';

Question: How many million viewers watched episode number 20?
SQL: SELECT "viewers_millions" FROM "table1_21025437_5" WHERE "episode_no"=20;

Question: What was the title of the episode written by Keith Temple?
SQL: SELECT "title" FROM "table1_21025437_5" WHERE "written_by"='Keith Temple';