CREATE TABLE table_3500 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "U.S. viewers  ( million ) " TEXT, "Rank  ( week ) " TEXT, "Original air date" TEXT, "Production code" TEXT)

Who wrote title number 38?
SELECT "Written by" FROM table_3500 WHERE "No." = '38'
SELECT "Written by" FROM "table_3500" WHERE "No." = '38'