The Backstage Rage

while walking home with a pizza Scooby and Shaggy find a violin case full of money Shaggy quickly phones the gang while Shaggy is in the phone booth the violin case vanishes then the gang arrives in the mystery machine but Shaggy asks Scooby what happend to the violin case full of money the gang finds their first clue a  puppet controller they read the words Pietro's puppets and so the gang goes to the String theater to investigate and are later chased by the phantom of the puppet theater he is later unmasked as Mr Pietro aka pop the doorman the episode ends as Scooby is wearing a silly magician costume