This is another Batman episode in which a character loses their life.
The first was in Smack in the Middle.
(edit) Mr. Freeze was portrayed by two other actors besides George Sanders. Also taking the role were director Otto Premminger and character actor Eli Wallach.
(edit) This is the first appearance of Mr. Freeze as well as George Sanders first of 2 appearances. (edit) Based on "The Ice Crimes of Mr. Zero" from Batman #121 (February 1959) by Dave Wood. Mr. Zero was changed to Mr. Freeze for the TV series, and the comics followed suit. (edit)

Batman: Mr. Freeze, give yourself up. We can get help for you... medical help!
Freeze: In prison? This I do not believe. No, you must PAY for what you did to me, for forcing me to live like this: never again to know the warmth of a summer breeze, never to feel the heat of burning logs in vintertime! Revenge. That is what I need! Revenge! I will have revenge! (edit) Batman: Poor devil... forced to live in an air-conditioned suit that keeps his body temperature down to 50 degrees below zero! No wonder his mind is warped. (edit)

George Sanders at one time was married to Zsa Zsa Gabor, who would later play the villainess Minerva in the final episode Minerva, Mayhem and Millionaires. (edit)

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