* AlternateCharacterInterpretation: One of the earliest examples of the "assertive" Clark Kent that became the mainstream interpretation in Post-Crisis stories.
* AwesomeArt:
* EarWorm: Superman's theme song/{{leitmotif}}, especially if you try to sing Superman's name along to it.
* FridgeLogic: In Jungle Drums, Lois is initially wearing her usual brown suit when she is captured by the natives and when she is threatened by the Nazis. Later on when she's on the pyre she's in a different white dress. Did the entirely male-populated Nazi-base just happen to have a spare white dress lying around that they decided to put her in for the ceremony?
* SugarWiki/HeartwarmingMoments: The final short ends with Superman flying past the American flag and giving a salute.
* MemeticMutation: The opening narration, especially "Faster than a speeding bullet", and also "Up in the sky! It's a bird! It's a plane!" The fact that the cartoons were repeated all over the world as pre-film features for years after they were first made ensured that they became catchphrases for multiple generations.
* NightmareFuel: One of the end sequences at the very end of one of the Direct to VHS tapes for this series starts playing "The Merry Go Round Broke Down", and halfway through, [[ScareChord a loud "DING!" sound is heard]] and the tape [[NothingIsScarier immediately cuts to black]].
** In "The Underground World" Lois and the resident scientist are captured by BirdPeople and brought to their throne room/altar. They see a near perfect golden replica of the scientist's father who went missing in the caves where bird people live years ago. Then they get tied to a stone, the floor under them splits open revealing a pool of boiling gold liquid and they realize [[TakenForGranite it's not a replica...]]
* OlderThanTheyThink: DC once stated in print that the earliest occurrence of the classic "Phone Booth Costume Change" happened in 1948. In the comics, perhaps -- but the Fleishers were there first by seven years in "The Mechanical Monsters" (1941).
* OnlyTheCreatorDoesItRight: The quality declined after Famous Studios took over production of the series.
* VisualEffectsOfAwesome: The rotoscoping looks amazing, and the animation still holds up well to this day. The special effects work is also particularly notable, such as the battle and subsequent meltdown of the giant laser cannon from "The Mad Scientist".
* WhatDoYouMeanItsForKids: "Jungle Drums," which is loaded with NightmareFuel, introducing images such as barbaric natives attempting to burn Lois alive. (Amusingly, this cartoon made its way onto a "Parent Approved" home video VHS tape of Public Domain cartoons.) The poisoned needle and giant Egyptian tomb guardians in "The Mummy Strikes" are also unpleasant bedtime contemplation for nervous children.