At the end of the episode, next week's villain is announced as the Joker. However the next villain is the Riddler.
This is one of a very few episodes where there is no batfight.
This is one of the few episodes in which Batman and Robin don't meet their adversary until the end of the episode.
Although this was Anne Baxter's last appearance as Zelda, she would later return to play a complete different character - Olga, Queen of the Cossacks.