CREATE TABLE table_25520 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT)

Who directed the episode which originally aired February 4, 2005?
SELECT "Directed by" FROM table_25520 WHERE "Original air date" = 'February 4, 2005'
SELECT "Directed by" FROM "table_25520" WHERE "Original air date" = 'February 4, 2005'