Who directed the episode which originally aired February 4, 2005?
CREATE TABLE "table1_228973_11" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text
);
SELECT "directed_by" FROM "table1_228973_11" WHERE "original_air_date"='February 4, 2005';