* EditedForSyndication and ClumsyCopyrightCensorship: Because of music clearance issues, the Netflix version of "A New Leaf" replaces the scene of Mr. Richfield singing "Purple Haze" while high with an alternate scene of Mr. Richfield singing an original song about how happy the happy plant is making him. It's not as clumsy as other examples, but it is a screw to people who wanted to see the episode as originally aired.
* HeyItsThatVoice: The Baby is Kevin Clash, whom you may recognize as [[Series/SesameStreet Elmo]] from ''Sesame Street''.
** Fran is voiced by Jessica Walter (the StalkerWithACrush in the movie ''Play Misty For Me'', the scheming, alcoholic matriarch Lucille Bluth on ''Series/ArrestedDevelopment'', and Archer's mother on ''{{Archer}}''). Also PlayingAgainstType, as this is probably the only time Jessica Walter has played a mom who actually loved, cared, and supported her husband and children rather than berate them, embarrass them, or screw them over with her drunken and passive aggressive antics.
** Earl is voiced by Stuart Pankin, a FormerlyFat character actor whom you may remember from the third ''Film/HoneyIShrunkTheKids'' movie or the ''Film/{{Zenon}}'' films.
** [[{{Seinfeld}} Jason Alexander]] played 3 or 4 roles (two of which were Baby's biological father and "Sexual" Harris), as did [[Series/StarTrekTheNextGeneration Michael Dorn]].
** The recurring character Spike, Robbie's delinquent friend, was voiced by [[Series/{{LawAndOrderSpecialVictimsUnit}} Christopher Meloni]].
** Charlene is voiced by Sally Struthers (Gloria on ''Series/AllInTheFamily'', Rebecca on ''TaleSpin'').
** B.P. Richfield is voiced by [[Series/TheJeffersons George Jefferson]] himself, Sherman Hemsley.
** Mr. Ashland is voiced by John Vernon (Dean Vernon Wormer in ''Film/AnimalHouse'').
** In the Mexican Spanish dub :
*** Earl, Fran, Baby, and Roy are is [[Disney/TheLionKing Pumbaa, Sarabi, Nala and Simba]] respectively.
*** [[Creator/PatriciaAcevedo Charlene]] is Anime/SailorMoon and [[Manga/DragonBall Chi Chi]].
*** Robbie is [[Manga/SaintSeiya Leo Aioria]], [[Anime/CardCaptorSakura Kero]] and [[WesternAnimation/DextersLaboratory Dexter]].
*** Brazil: Earl and Charlene are [[Film/HarryPotter Rubeus Hagrid and Bellatrix Lestrange]].
* TheOtherDarrin: Played with. Fran's animatronic was entirely redesigned for the second season so it absolutely does not resemble her first incarnation, but her voice actress (Jessica Walter) stayed on and played her for the entire series.
* TorchTheFranchiseAndRun: This is why the series ended with the ecological disaster that killed off the dinosaurs.
* WhatCouldHaveBeen: This was originally intended to be a dramatic feature film called ''The Natural History Project'' with Warner Bros. set to distribute and Creator/JimHenson directing. However ''TheLandBeforeTime'' was released and Henson decided to turn the idea into a sitcom, which CBS greenlighted. It wasn't until Henson's death and CBS putting the show into turnaround that the show got made.
* The only puppet that still exists is Baby Sinclair, aside from a somewhat degraded unisaur head. The latex used to make the puppets degrades quickly in light, so most of them disintegrated rather fast.