Batman S2E4: The Cat and the Fiddle

Catwoman disguises herself as a wealthy recluse - Minerva Matthews - to exchange a quarter million dollars for two Stradivarius violins. Once the instruments are safely in her hands, the villain reveals her true identity and demands the cash back. But Catwoman is surprised to learn that her business partner - Zubin Zucchini - is also not who he appears to be.