Batman - Series 2 - The Impractical Joker

Fantasy adventure series. The Joker is on a crime spree involving keys and manages to incapacitate Batman and Robin with a mysterious little box; in reality, the Duped Duo have been hypnotized. They discover Joker in an old key factory, and are captured. Robin is placed in a machine that will spray-wax him to death while Batman is strung out on a giant human key duplicator.