What's the title of the episode seen by 3.8 million people in the US?
CREATE TABLE "table1_20046379_3" (
  "no_in_series" text,
  "no_in_season" text,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_millions" text
);
SELECT "title" FROM "table1_20046379_3" WHERE "u_s_viewers_millions"='3.8';