The "24k Gold" M3 Stuart tank (purportedly created from gold bullion with plans stolen from the Hexagon by The Penguin and Marsha Queen of Diamonds) and stopped with the "Batzooka", was an actual M3 Stuart painted gold.
The 2016 book "Batman: a Celebration of the Classic TV Series" reveals several alternate titles considered for this installment: "Penguin and Marsha's Disatrous End"; "Penguin and Marsha Reach a Dead End"; "Penguin and Marsha Fail to Blend".
Major Beasley actor Bob Hastings would later portray Jim Gordon in both Batman the animated series as well as several batman animated movies