When Bruce fights Inque, the Batman TAS theme can be heard.
Inque's attempt to kill Batman by smothering him within her body was a tactic also used by Clayface in "Mudslide".
At the end of the episode, Bruce looks at Inque and says, "Poor deluded fool". He could also be saying "diluted" which means to add water to a liquid to weaken it, but Terry looks at him in surprise, implying that he was playfully insulting Terry for underestimating him.
Despite it being destroyed, Mr. Freeze's gun later reappears on display in the Batcave in future episodes. It's possible that Bruce rebuilt it after its destruction, or he may have kept a few of Mr. Freeze's old guns in the cave.
This episode makes several references to the previous episode, "Black Out": Bruce gives Terry Mr. Freeze's gun before he goes after Inque, because that's how he had defeated her before. Inque destroys the gun and asks Terry "What are you going to do now?". Terry reminds Bruce that Inque had broken into the Batcave. Inque refers to the assignment given by Derek Powers to kill Batman.