CREATE TABLE table_26551 ("No. in series" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT)

When 446004 is the production code who are the writers?
SELECT "Written by" FROM table_26551 WHERE "Production code" = '446004'
SELECT "Written by" FROM "table_26551" WHERE "Production code" = '446004'