At the end of this episode, Mr. Freeze is supposedly dead. However, he appears in the future in the Batman Beyond episode, "Meltdown." This episode sets up the storyline for it. (edit) Michael Ansara (Mr. Freeze) and Lloyd Bochner (Mayor Hamilton Hill) reprise their roles from Batman: TAS. (edit) Though this episode follows the events of Subzero, it wound up airing before the movie's release. (edit) Bullock is absent in this episode. (edit)

(Tim failed a civics test at school)
Bruce: You don't know the first thing about the American justice system, do you?
Tim: I know it's bogus.
Bruce: And how did you come to that well, thought-out conclusion?
Tim: Watching you. You don't exactly follow the rules of due process.
Bruce: I...how did you do on your math test? (edit) Mr. Freeze: I'm not here to steal bones. I'm here to steal hope. (edit) Mr. Freeze: Search your hearts for the thing you value most, then despair, for I have come to take it from you. (edit) Bruce: (on TV) As my father once told me, 'Those who have the most, must give the most.'
Mr. Freeze: Those who have the most also have the most to lose, Mr. Wayne. (edit)

When Mr. Freeze comes walking in as a head, Batgirl's neck is showing and part of her costume is suddenly missing. It's her bare neck out of her costume. (edit)

This episode does not have any allusions. Add some now!