How many millions of U.S. viewers watched the episode titled "Lost Boys"?
CREATE TABLE "table1_27389024_2" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "u_s_viewers_millions" text
);
SELECT "u_s_viewers_millions" FROM "table1_27389024_2" WHERE "title"='\"Lost Boys\"';