CREATE TABLE "table1_15026994_2" (
  "num" real,
  "episode" text,
  "writer" text,
  "director" text,
  "original_air_date" text,
  "viewing_figure" text
);

Question: How many different directors are associated with the writer Gaby Chiappe?
SQL: SELECT COUNT("director") FROM "table1_15026994_2" WHERE "writer"='Gaby Chiappe';

Question: What writers are associated with a viewing figure of 7.01 million?
SQL: SELECT "writer" FROM "table1_15026994_2" WHERE "viewing_figure"='7.01 million';

Question: What are all episodes with a viewing figure of 6.72 million?
SQL: SELECT "episode" FROM "table1_15026994_2" WHERE "viewing_figure"='6.72 million';

Question: What original air dates are associated with a viewing figure of 7.27 million?
SQL: SELECT "original_air_date" FROM "table1_15026994_2" WHERE "viewing_figure"='7.27 million';