CREATE TABLE table_228973_11 (directed_by VARCHAR2, original_air_date VARCHAR2)

Who directed the episode which originally aired February 4, 2005?
SELECT directed_by FROM table_228973_11 WHERE original_air_date = "February 4, 2005"
SELECT "directed_by" FROM "table_228973_11" WHERE "February 4, 2005" = "original_air_date"