Richie Rich; Cadbury; Richard Rich Sr.; Regina Rich; Professor Ludwig
Music teacher Professor Ludwig, really a criminal, tricks Richie into learning a mesmerizing tune on the clarinet that hypnotizes everyone at Rich Manor so that the Professor and his gang can rob them. They are free and clear until Cadbury arrives.
Richie is intent on winning an auction for a desk his mother has given away that morning. Some crooks conclude the desk must be very valuable. Turns out it is made of gold, but Richie is more interested in a letter from Gloria he has left in a secret drawer.