What's the title of the episode seen by 12.85 millions of people in the US?
CREATE TABLE "table1_28212888_2" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "u_s_viewers_millions" text
);
SELECT "title" FROM "table1_28212888_2" WHERE "u_s_viewers_millions"='12.85';