CREATE TABLE table_74033 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( millions ) " TEXT)

Who was the writer of the episode with a production code of 5aky04?
SELECT "Written by" FROM table_74033 WHERE "Production code" = '5AKY04'
SELECT "Written by" FROM "table_74033" WHERE "Production code" = '5AKY04'