* CreatorBacklash:
** Although they all praise the performance of the voice-actors (especially ComicBook/JimmyOlsen's VA), the production team has a very low opinion of "Superman's Pal", an episode of the third season [[ADayInTheLimelight focusing heavily on Jimmy Olsen]].
** They have a low opinion of "Little Big Head Man", which they felt tried and failed to recapture the success of the earlier Mxyzptlk episode.
* ExecutiveMeddling: [[WhatCouldHaveBeen Originally]], Ma and Pa Kent were supposed to die in ''Apokolips... Now!'', but DC said that if they were killed they would need to be brought back to life later. Unwilling to [[DeathIsCheap walk down that path]], the target was shifted to a different character.
* HeyItsThatVoice
** Creator/TimDaly is Superman.
** [[WesternAnimation/TeenTitans Robin]] is a member of Intergang! (see "Little Girl Lost")
*** He's also a {{Jerkass}} schoolmate of teenage Clark.
** Creator/DavidKaufman is Jimmy Olsen.
*** Coincidentally, in an episode of ''WesternAnimation/BackToTheFuture The Animated Series'' titled "Super Doc", Marty McFly (also voiced by David) goes by the name Jimmy Olsen while in 1952.
** Creator/ClancyBrown is SelfDemonstrating/LexLuthor.
** Lisa Edelstein, best known as [[{{House}} Dr. Cuddy]], is Mercy Graves.
** Creator/BradGarrett is Bibbo and Lobo.
** MichaelIronside is Darkseid.
** Creator/MichaelDorn is {{Steel}} and Kalibak.
** Miguel Ferrer (''Film/RoboCop1987'', ''Series/TwinPeaks'', ''HotShotsPartDeux'') voices both Weather Wizard and ComicBook/{{Aquaman}}
** Ted Levine (''Literature/TheSilenceOfTheLambs'', ''Series/'{{Monk}}'') voices Karkull and later [[GreenLantern Sinestro]]
** Creator/RonPerlman voices Jax-Ur
** Creator/MalcolmMcDowell is Metallo
** Creator/JasonMarsden is Clark Kent as a teenager
** Creator/CoreyBurton is Brainiac
** GilbertGottfried is Mr. Mxyzptlk
** Melissa Joan Hart is Saturn Girl
* OffModel: The animation team did this intentionally, removing the "S" shield from Superman's cape in order to save themselves from having to animate how the shield would look as the cape rippled and moved.
* RealLifeRelative: Ma and Pa Kent's voice actors (Mike Farrell and Shelley Fabares) are married in real life.
* WhatCouldHaveBeen:
** The original plan for "Apokolips...Now!" had Ma and Pa Kent killed instead of [[spoiler: Dan Turpin]], but [[ExecutiveMeddling DC said they would need to bring the Kents back to life if that happened]]. Since Creator/BruceTimm wanted to avert DeathIsCheap the target character was switched.
** [[http://worldsfinestonline.com/WF/superman/backstage/interviews/dorkindyer.php The original, much darker plans]] for "Little Girl Lost" involved Superman discovering that Darkseid was turning humans into Parademons, with heavy [[ThoseWackyNazis Nazi overtones]] for the transformation camps, and the episode ended in the midst of a large scale battle on Apokolips. The authors do like the finished episode, but were very disappointed with the heavy backtracking after they had already been given the go-ahead for the initial plot.
** "Legacy" was intended to kick off a season's worth of episodes about Superman regaining the world's trust. However, a pushback and other projects (''WesternAnimation/BatmanBeyond'') led to it being produced as the finale instead, while the theme of public distrust for metahumans became an underlying plot thread in ''WesternAnimation/JusticeLeague''.
** ClancyBrown originally auditioned for the role of Superman before being cast as Lex Luthor, and according to the producers his initial reaction to being asked to play Luthor instead was "Am I ever gonna get to play a good guy?"
** Sherman Howard was considered for the role of Luthor, having previously played the character in "The Adventures of Superboy". According to Bruce Timm, Howard gave an impressive audition, and was nearly offered the role . . . until Clancy Brown walked in. Howard gave one-off performances as The Preserver and General Steppenwolf, and later voiced the Luthor-like Derek Powers in ''WesternAnimation/BatmanBeyond''.
** Paul Dini and Bruce Timm originally wanted to use Kara Zor-El as Supergirl, but they were denied by DC Comics due to the then-current "Superman is the ''only'' survivor of Krypton" edict.
----