"Penguin's Disastrous End" begins with the Dynamic Duo escaping their scrap metal coffin with an acetylene torch buttressed by Bat Air Pumps, while Penguin plots to invade Gotham City's federal subtreasury building, which houses $10 million worth of gold bullion, too heavy to be moved by any attempted theft, the bored guards understandably distracted by Marsha's dance of the seven veils, then captivated by another batch of love potion whipped up by Aunt Hilda (Estelle Winwood). Once inside, Penguin uses the WW2 plans stolen from the Hexagon to build an impregnable solid gold tank: "never count your Penguins before they're latched!" Alas, squashing Chief O'Hara's squad car is about all Penguin and Marsha accomplish inside their rolling hideaway, once Robin utilizes the Batzooka. This was Burgess Meredith's final appearance this season, but The Penguin would enjoy the honor of opening the final Batgirl season. As for Carolyn Jones, this three parter marked her only return after her initial two part debut, but at least she was allowed to unveil six of her seven veils!