Dr. Casandra and her husband Cabala use a potion that turns them invisible to carry out a series of bank robberies. They then launch a daring escape from the main villains of the Gotham City Penitentiary in order to form a gang of invisible thieves. Entertaining episode with some mistakes. One of the villains released is King Tut who had regained his true personality as a professor of Egyptology just two episodes earlier. The unleashed Catwoman more physically resembles Julie Newmar than Eartha Kitt who had played the villain this season. Dr. Cassandra's costume had previously been used in two different episodes of the second season.