Mom and Dad Have a Great Big Fight & D.W.'s Perfect Wish

Mom and Dad Have a Great Big Fight: D.W. and Arthur overhear their Mom and Dad arguing and fear that it will split their family.
D.W.'s Perfect Wish: D.W. is not as excited about her fifth birthday as her previous birthdays because according to Emily, after she turns five, she will no longer be a kid. Arthur goes over past events (from previous episodes) with D.W. to cheer her up. This works and she goes on to her birthday party to make a wish.