CREATE TABLE table_2892 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "U.S. viewers  ( million ) " TEXT, "Original air date" TEXT, "Production code" FLOAT)

Who wrote the episode that aired February 4, 2010?
SELECT "Written by" FROM table_2892 WHERE "Original air date" = 'February 4, 2010'
SELECT "Written by" FROM "table_2892" WHERE "Original air date" = 'February 4, 2010'