The Backstage Rage

Scooby and Shaggy see a car drop a violin case full of money, but while Shaggy calls the others and Scooby is distracted, the case and money are stolen. The kids decide the money must have been counterfeit, and when they find a marionette puppet control on the ground near where Shaggy and Scooby left the money, the kids head over to the local theatre where a puppet troupe is currently performing.