 The ladies find an anonymous letter in Mary Alice s belongings which suggest that Mary Alice was hiding some terrible secret. Susan and Edie continue to fight for Mike s affections. But Mike s dog pays the price when Edie crashes his dinner date with Susan. Meanwhile, Gabrielle realizes that her lawn boy, John, is taking their fling to heart, and that Carlos may actually be catching on. Bree goads Rex into couples therapy, where the neurotic doctor may be the one who needs the most help. Lynette resorts to drastic measures to keep her kids in line, but it blows up in her face. Mary Alice s past resurfaces despite Paul and Zach s efforts to keep it buried... literally. Also, Susan s secret of accidentally burning down Edie s house may come back to haunt her as the measuring cup she left in Edie s house is found, by the nosy and bossy Mrs. Huber.