CREATE TABLE table_228973_11 (written_by VARCHAR2, original_air_date VARCHAR2)

The episode which originally aired on December 17, 2004 was written by whom?
SELECT written_by FROM table_228973_11 WHERE original_air_date = "December 17, 2004"
SELECT "written_by" FROM "table_228973_11" WHERE "December 17, 2004" = "original_air_date"