D.W. Aims High: D.W. wants to be the first person to set foot on Mars! But what if scary purple aliens eat her? With help from her dad, D.W. separates fact from fiction and discovers the excitement of space exploration. Flaw and Order: Who's responsible for cracking Dad's cake platter? DUN-DUN! All the evidence points to Arthur! DUN-DUN! Or does it? DUN-DUN! With Buster's help, Arthur sets out to clear his name - and figure out what keeps making that mysterious yet familiar "DUN-DUN!" sound.