CREATE TABLE table_23483182_1 (written_by VARCHAR, original_air_date VARCHAR)

Who wrote the episode that aired February 4, 2010?
SELECT written_by FROM table_23483182_1 WHERE original_air_date = "February 4, 2010"
SELECT "written_by" FROM "table_23483182_1" WHERE "February 4, 2010" = "original_air_date"