The episode's original cliffhanger ending involved Batman, Robin and Batgirl in a death trap together, more in line with the first two seasons. However, the plan was scrapped due to budgetary reasons. While the cliffhanger was rewritten, Joker's line about thinking the three had perished in the trap remained in the script for part two.
In this episode, actor Dick Kallman plays a man who has an antique nightshirt stolen from him by Joker and Catwoman. Ironically, 14 years later, Kallman, by then a dealer in fine antiques, was shot and killed, along with his business partner, by a man robbing his antique store. He was only 46. Although the criminal was eventually captured, tried, and sentenced, none of the stolen items were ever recovered.