Who directed the episode watched by 2.01 million US viewers?
CREATE TABLE "table1_28466323_2" (
  "no" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_million" text
);
SELECT "directed_by" FROM "table1_28466323_2" WHERE "u_s_viewers_million"='2.01';