CREATE TABLE table_22783 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "U.S. air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

When 3t7458 is the production code who are the writers?
SELECT "Written by" FROM table_22783 WHERE "Production code" = '3T7458'
SELECT "Written by" FROM "table_22783" WHERE "Production code" = '3T7458'