In the scene when the Kaznian princess changes clothes for the bride party, the ears of Wonder Woman are drawn badly--they have no ear holes.
Storyboard artist Bret Blevin's name is misspelled "Belvins" in the end credits.
As we see Batman as Bruce Wayne for the first time in the Justice League series, his eyes are dark-colored. However, in the Batman Gotham Knights series, his eyes were blue.
Although the writers carefully avoided the word "Nazi" in "The Savage Time," Wonder Woman now calls Vandal Savage a "Nazi war criminal".
If one thinks about it hard enough, it seems that several things in this episode contradict the events of "The Savage Time." Savage didn't seem to be a public figure in that episode, but Audrey mentions Savage's "grandfather" in old news reels. The League changed history (or WW2 Savage changed history, and the League changed his changes) in "The Savage Time," so it's a little unclear - but is the World War II people now remember the same as it was before Savage initiated his plans and the League went back to stop him? Was there ever a World War II where Savage didn't exist as a Nazi wannabe conqueror, a history before his future-self sent back knowledge to his WW2 self? The impression from "The Savage Time" was that the League altered time and future-Savage never helped WW2-Savage, so apparently WW2-Savage still played a significant public role in WW2. But it's kinda hard to tell - aren't temporal paradoxes fun?
Audrey: Could you be a dear and pound on them mercilessly?
Wonder Woman: I don't think that will be necessary.
Audrey: I won't tell anyone that their great hero has feet of clay.
Wonder Woman: You have no idea.
Batman: Who are you working for?
Kasnian Thief: (in Kasnian) You can't understand a word I'm saying and I wouldn't tell you anything if I could.
Batman: (in Kasnian) I can...and you will.
Audrey: That was fabulous – I've never seen someone break a helicopter before.
Wonder Woman: It was my first time.
Wonder Woman: You give up – right?
Bodyguard: (in Kasnian) Kursin! (subtitled) Poop!
The nation of Kasnia was also used in the Superman: The Animated Series three-part pilot. It was implied that John Corben, AKA Metallo, hails from that country.
Batman says "Erlem" (I can) to a henchman that he confronts when breaking into a chemical factory. He says this in response to the guard speaking what they label in the show as "Kasnian". However, "ertem" is actually Hungarian and in literal translation it means "I know," which is his confirming he knows what the henchman is saying.
Character bios: Vandal Savage, Colonel Vox
Phil Morris reprises his role as Vandal Savage.
The nation of Kasnia featured here also plays a part in the VHS/DVD Batman: Mystery of the Batwoman.
First apppearance of Batman's alter ego Bruce Wayne.
When Cartoon Network premiered this episode, they aired the two episodes back-to-back, without inserting closing credits at the end of part one or opening credits/recap at the beginning of part 2. They still listed the title and writer/director credits, though.
One of the photographers Wonder Woman passes when entering the party (and later at the night club) looks like an older, seedier French version of Jimmy Olsen.
Only Wonder Woman and Batman appear in this episode.
The name, character, and look of Princess Audrey clearly alludes to famous actress Audrey Hepburn who similarly played princesses, most notably in Roman Holiday where Hepburn portrays a young princess tired of royal life and seeks a day in town.
Audrey: I won't tell anyone the great hero has feet of clay.
Audrey didn't know how right she was. The Amazon queen Hippolyta sculpted a little girl out of clay, and the gods gave the statue life. Hippolyta took the girl as her own daughter and named her Diana. The rest of the world, of course, knows her as Wonder Woman. (Editor's note: this hasn't been confirmed in the animated series' continuity, however.)