Which episode number in season 5 was viewed by 3.00 million U.S. viziers?
CREATE TABLE "table1_11820086_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_millions" text
);
SELECT MIN("no_in_season") FROM "table1_11820086_1" WHERE "u_s_viewers_millions"='3.00';