 Doug and Carrie feel that they are ready to become parents. Their only problem is that Arthur is always around, and never gives them any time to themselves. Doug hires a dog walker named Holly (Nicole Sullivan) to walk Arthur for a couple hours. Arthur does not know that Holly is a dog walker. Carrie uses the time for her own personal pleasures. Doug hates that she is not paying enough attention to him with the time he is buying. Eventually, Arthur finds out what Holly does. Eventually, Arthur and Holly become good friends.