While inside the crusher, Batman plucks The Batpumps from his utility belt and uses them to counter the crusher's external pressure with air pressure and stop it from turning him and Robin into paperweights. The Duo then use a torch to slice their way out of their scrap metal cocoon. Meanwhile, Marsha and Aunt Hilda find their old toads and create a batch of love potion to use on the guards at The Gotham City Sub-Treasury, and while The Queen Of Diamonds mesmerizes the guards with her Dance Of The Seven Veils, Penguin and his men move mysterious equipment inside the gold vault. The Caped Crusader has tracked Aunt Hilda's escaped lizards back to her underground hideout, where they find the missing chainmail armor and one of Penguin's thugs, who unwittingly alerts The Dynamic Duo as to The Penguin's present location. Having secured The Fink, The Duo speed for The Sub-Treasury, just as Penguin, Marsha, Hilda, and the rest of the gang lock themselves up inside the vault.

For 3 long days, The Batman, Robin, Chief O'Hara and Commissioner Gordon wait outside, while the gang, inside the vault, aided by a tank of fresh air, remain until finally, they burst from within inside a solid gold tank (constructed from the swiped Hexagon plans and the gold in the vault!)! They piece the entire mystery together: Penguin used his sinister movie studio to steal the chainmail armor (Part 1), used the armor to steal the plans from The Hexagon (Part 2), and used the plans to build the tank (Part 3)! Chief O'Hara dives into his squad car and uses it to block the tank, but the tank runs right over it, crushing the vehicle flat! The Dynamic Duo, Gordon, and several boys in blue move the flattened car to discover O'Hara had dove into a manhole with his very life. Batman and Robin give chase in The Batmobile and use The Batzooka to disable the tank, forcing the villains to surrender. Bruce Wayne and Dick Grayson end with watching a 16mm home movie of Marsha and Batman kissing, at home with Alfred and Aunt Harriet.

NEXT WEEK: John Astin as The Riddler battles Batman!