In "D.W.'s Blankie," Arthur's bratty sister, D.W., loses her precious security blanket, and it's up to Arthur to help her look for it. If they can't find it, D.W. faces the impossible -- spending the night without her blankie! Also includes the episode "The Perfect Brother," in which Arthur has a friend spend the night but finds it difficult to be around someone who acts like the perfect kid. But is his friend just putting on an act?