History YMMV / InfinityTrain

** MT can be hard to sympathize with in Book 2. While she ''does'' get a lot of CharacterDevelopment and the show makes clear how much she simply wants to be free from the Mirror World's grip, that isn't really an excuse to [[spoiler:endanger the lives of multiple passengers, such as the old man who was sleeping in his pod or the little girl who was about to get her number. While most of the damage she potentially caused could be easily undone or was even shown to not leave a great impact, she had no reason to be ''this'' [[HotBlooded violent]] or [[ItsAllAboutMe intrusive]] about it. It doesn't help that she's never shown to be sorry about any of her harmful actions and her default reaction to being even mildly called out is to whine about how hard she has it and how much she just wants to be real]].

* OlderThanTheyThink: ''WesternAnimation/AdventureTime'' features an [[Recap/AdventureTimeS5E36DungeonTrain episode]] where the main characters wind up on a train with an infinite number of carriages, containing puzzles and challenges that lead them onto the next carriage. Owen Dennis was gutted to learn that, prior to pitching the show, ''Adventure Time'' had already used a similar premise, and told the show's crew about the situation, with them giving him the go-ahead to still use it.

* EnsembleDarkhorse:
** Spokesperson!Atticus and Actress!One-One. They are only there for a quick joke in Episode 5 but are very memorable for the sheer absurdity of it.
*** On a similar note, Mirror!Atticus and Mirror!One-One are a (One-)OneSceneWonder, due to establishing that Car inhabitant reflections have opposite personalities, which is technically FanficFuel.
** "Good Guy" and "Bad Guy" from Tulip's game are really just background decorations, but they stuck with fans, to the point that they are official icons on the show's subreddit.
** Randall has gotten a lot of recognition for being a friendly, sentient water puddle who is completely willing to help Tulip catch up with the Cat. Some would've liked to see him as the fourth party member, but that would've been too many characters to juggle. He becomes a recurring character appearing in one of the Train Shorts and an episode in Books 2 and 3.
** Nancy only appeared in one episode, and only at the very beginning at that, but fans remember her for her friendly personality and CreepyCute design. She returns for a small cameo in "The Lucky Cat Car".
** Mikayla is completely irrelevant to the plot of the series, but many fans like her since [[TrueCompanions she's a legitimately good friend to Tulip]].
** [[spoiler:Alrick is only really important for the Conductor's backstory, but many fans understand why she was in love with him so much, since he was an {{Adorkable}} goofball who reliably stayed by her side throughout their entire lives.]]
** Frank the Bear only appears briefly in Book 3, but many fans love him for being a MomentKiller and a genuine NiceGuy.
** The Chandelier Escort from "The Debutante Ball Car" gets a lot of love for his design and voice, despite only appearing briefly.
** While Tuba is billed as a primary character for Book 3, [[spoiler: she only appears for about 4 episodes before being killed off]]. Regardless, she's beloved by the fanbase for her [[UglyCute design]], stoic personality, and being a giant gorilla with tubas strapped to her back.

* FanficFuel: Let's just say that just as there are infinite cars on this train, there are just as infinite ideas for fanfics of it.
** The train itself. While we know the train's purpose, there's still the big questions of who built it, where it came from, and how long it's existed? The series itself has only briefly touches upon that last one, with a few episodes making it clear in casual dialogue that the train as been around for a few centuries at ''minimum''.
** What type of people are on the train and what problems are they going through? In addition to original character fics, many fans have also made [=OCs=] called [[https://twitter.com/hashtag/infinitysona?src=hashtag_click "Infinitysona"s]] along with a denizen to help them on their journey.
*** We've also only seen passengers from Western countries. What about those from countries like Japan?
** Seeing that the train is infinite and hosts numerous worlds, coming up with different types of cars for [=OC=]s and crossover characters to explore is a fun challenge.
** Tulip [[spoiler:has no reflection at the end of Book 1]]. How will this affect her, and what would happen if others notice?
** What type of adventures will Tulip's reflection go through on the train was this until Book 2 answered it.
** In "[[Recap/InfinityTrainS1E10TheEngine The Engine]]", [[spoiler:Tulip uses Amelia's tape to momentarily distract her, but it doesn't work thanks to the intervention of the Steward. Really makes one wonder how she experienced ''her'' memories]].
** Since YearInsideHourOutside isn't in effect on the titular train, how do the family and friends of passengers cope with the sudden disappearance of their loved ones? And how do they react when they return months or even years later? Or would they even follow the passengers to the Train ''because'' they've disappeared?
** One word: Amelia. [[spoiler:Her number is so ''obscenely high'', it begs a few questions: what did she do over the past thirty years to get it that high? What will she have to do to get it down to zero and leave the Train? Is that even possible at this point? Book 3 shows she's now working under One-One as an engineer as a form of redemption, but will that be enough to accomplish her goal?]]
*** Come the end of Book 3, there's the added questions of [[spoiler:her relationship with Hazel. How close do the two of them become? If Amelia getting off the train becomes plausible, how will that affect Hazel if she does become attached to the older woman? Would Hazel be able to follow her to Earth like Lake did with Jesse or be left behind like any other denizen?]]
** There are two feuding families in "The Family Tree Car" which makes one wonder why ''those'' two families in the Infinity Train exactly? Are they related to the train's construction in some way?
** Real world knowledge of the train. How many people know about the train? Are there people back on Earth actively investigating it? WordOfGod has confirmed that it has become a seldom discussed internet myth in the present day, with former passengers occasionally being able to find each other, and that world governments are investigating its existence.
*** After Book 4 revealed its protagonists to be musicians, fics where their band is used as a way for former passengers to connect with each other became a popular way to tackle this subject.
** Mace and Sieve were once reflections of other people but joined the Mirror Police so they wouldn't lose their memories. What were their "primes" like?
*** The Mirror World in general can inspire this. Did Lake's successful escape have any effect on the Chrome Car, spurring a mirror rebellion? What's the deal with the reflections of deceased characters like [[spoiler: Simon and Tuba]]? Would they choose to be recycled or become Mace and Sieve's replacements?
** Three words: "LivingShadow Car"; having similar functions of the Chrome Car, but with sentient shadows of their primes instead of reflections.

* {{Fanon}}:
** Tulip being somewhere on the autistic spectrum is a common headcanon, due to having a special interest (programming, in her case) and also a [[InnocentlyInsensitive lack of understanding of other people's emotions]], common symptoms for those on there.
** Similarly Simon is commonly viewed to have Borderline Personality disorder given his intense fear of abandonment, lack of social skills, unstable relationships, trouble understanding what others want, emotional swings indications from the writers that he had feelings of self harm, and anger among other things.
** It's never explicitly stated whether [[spoiler:Amelia and Alrick were still only engaged or if they had married by the time of the latter's death]]. Canonically, it's the former, but pretty much every fan depicts them as the latter. Not helped by the fact that the only mention of their relation is when Tulip says [[spoiler:"I'm sorry about your husband, Amelia"]] and [[spoiler: Amelia]] doesn't correct her otherwise.
** MT is frequently headcanonned as nonbinary, due to her being a reflection and thus [[NoBiologicalSex probably lacking a sex]], having an arc about being her own person and distinguishing herself from Tulip, her androgynous appearance in Book 2, and [[spoiler: her choosing of the name "Lake" (which follows the naming conventions favoured by younger nonbinary people)[[note]]That is to say, using place and object nouns rather than traditional names due to the limited pool of gender neutral ones[[/note]]]]. Whether or not fanworks taking this approach have MT use gender neutral pronouns in addition to (or in place of) the female ones she responds to in canon [[DependingOnTheWriter depends on the writer]].
** Simon is the ''only'' main character to never have his pre-train backstory revealed in any way, outside of once ranting about funerals. That said he is commonly believed to have come from an abusive household, usually from ParentalAbandonment or ParentalNeglect, given how he displays clear trust and abandonment issues.
** Less commonly, Owen Dennis's joke that Simon failed a spelling bee is taken as canon despite Owen Dennis saying it sarcastically and later stating he prefers fans to come up with their own answers for mysteries in the show.
** [[spoiler:Fans like to speculate that the Ghom that killed Simon was either Tuba's soul turned into a Ghom getting revenge on what he did to her or the same one that traumatized him for life all those years ago.]]
** Though WordOfGod says that they're both 18, since this is never outright stated in the show, many fans depict the duo as being in their early twenties, with Grace being slightly older than Simon.
** In the aftermath of "The New Apex", some fans began theorizing that [[spoiler:being devoured by a Ghom causes one to reincarnate as a train denizen]]. It mostly gained popularity since [[spoiler:it would both serve as a FateWorseThanDeath for Simon, as well as a chance for him to start over and eventually atone for his past crimes]].
** After "The Train to Nowhere", a lot of fans ran with the headcanon that [[spoiler: Ryan and Min-Gi had started dating by the time their gig in New York is shown, as Ryan's behavior towards Min-Gi on stage can come across as rather flirty and the lighting has very prominent [[QueerColors rainbow colors]]]].

!!Subpages:

* LikeYouWouldReallyDoIt:
** Played with in Book 1. [[spoiler:While he's back to normal by the end of the season, the shock value related to Atticus' transformation into a Ghom comes from the fact that ''no one'' thought the writers would have the balls to show a cute little corgi getting shot like that.]]
** [[AvertedTrope Utterly averted]] in Book 3 with [[spoiler:Tuba and Simon's deaths]].

* AngstWhatAngst: In "The Lucky Cat Car", Khaki Bottoms is seen with a big smile on his face, a jiggle-wiggle in his paws, and one of his ears lost, showing that he's not traumatized in the slightest [[spoiler: after Amelia destroyed the Ball Pit Car.]]

* AbandonShipping: Grace and Simon were originally a popular pairing when they debuted in Book 2, as fans loved the dynamic they had. However, the ship starting losing fans as Book 3 progressed, with Grace undergoing CharacterDevelopment contrasting with Simon becoming more unstable, until the ending saw [[spoiler:Simon trying to murder Grace by throwing her to the train's wheels]]. By that point, pretty much everyone had jumped ship.
* AccidentalAesop: Sometimes it's better to admit you don't know anything than continuing to lie that you're an expert. [[spoiler:The Apex was only made because Grace lied to Simon about "knowing the Train", which spread into the cult that would hurt innocent denizens for their own selfish purposes. Even Grace had to admit to herself that she didn't know everything and lied to hide the fact that she's afraid of people looking down at her.]]

** [[spoiler:Alrick]], another Brit who loves to tease his wife with a robotic voice and thinks pranks are the height of comedy.

* AngstWhatAngst: In "The Lucky Cat Car", Khaki Bottoms is seen with a big smile on his face, a jiggle-wiggle in his paws and one of his ears lost, showing that he's not traumatized in the slightest [[spoiler:after Amelia destroyed the Ball Pit Car.]]
* AnimationAgeGhetto: The reason why show was cancelled. It was very mature and complex for a kids' cartoon, featuring graphic violence, disturbing content, and heavy themes such as divorce and mourning. Cartoon Network grew increasingly uncomfortable with what the writers wanted to explore in the show, deeming them too inappropriate for children. This in spite of the show garnering a massive teen and adult following. The deal-breaker that ultimately led to its cancellation was the showrunners wanting the fifth season to feature an adult protagonist as opposed to the kid or teenage protagonists of the prior seasons ("child entry point").

** [[spoiler:"[[https://www.youtube.com/watch?v=7o3E0xkoYRE Train To Nowhere]]" from the end of Book 4 (and the series) is an upbeat song about Ryan and Min-Gi’s time there and a symbol of their renewed friendship.]]

** Grace and Simon have a splintered reaction. While it's accepted that both characters contributed to how things ended in Book 3, some fans debate that one character deserves more blame than the other; be it Grace for putting Simon on the path to becoming a sociopath and forming The Apex to begin with, or Simon for refusing to change his ways at every possible opportunity. Then there's a third party who blame ''Amelia and Tulip'', since if their altercation didn't occur months prior, [[spoiler:One-One wouldn't have been reinstated as Conductor and order the quarantining of Amelia's cars]], which set off the events of Book 3 to begin with.
* BrokenBase: [[spoiler:Did Grace deserve to still lead the Apex after everything she did to them? On one hand, she arguably should take the responsibility of cleaning up the mess she made; but on the other hand, she was ''not'' considered parental material at all and they only got to where they were because of her lies and mistakes.]]

** [[spoiler:MT giving Mace his well-deserved death via grinding him on the train's wheels in "The Wasteland." [[https://twitter.com/lindsaykatai/status/1302564264540999682 Even the writers said you were supposed to feel relief at Mace's death.]]]].
** For some, it is very satisfying seeing Simon get knocked down a peg when [[spoiler:Amelia spells it out to him what the train is really for, and that he is nothing but a child with a bad attitude throwing a temper tantrum. It is also satisfying how her DeflectorShield basically beats up Simon without her even needing to lift a finger against him]].
** [[spoiler:Simon dies a horrible death by his childhood trauma Ghom in the season 3 finale is this for some. Though word from the writers was his death [[https://twitter.com/lindsaykatai/status/1302564264540999682 is meant to be seen a tragedy]] unlike with Mace and Sieve.]]
** Min-Gi being proven wrong in "The Astro Queue Car" is a very satisfying scene for some, seeing as he'd spent the entirety of the episode being an overly smug, condescending jerk towards Ryan.

** Some feel this way about The Cat after "[[Recap/InfinityTrainS1E5TheCatsCar The Cat's Car]]", since at the end she's understandably completely terrified for her life and seems devastated when the Steward destroys her home. It gets worse in "[[Recap/InfinityTrainS1E8TheBallPitCar The Ball Pit Car]]" when [[spoiler:it's clear she's little more than a terrified slave to the Conductor, desperately trying to get out of the situation she's found herself in... only for the Conductor to [[ILied go back on her deal and have the Steward attempt to kill her anyway]]. Luckily, the next episode shows that she survived]].
** [[spoiler:The Conductor]] themselves garnered sympathy from fans at the end of Book 1, when it's revealed that [[spoiler:she had a happy life until her fiancé died young. While a cruel and callous ControlFreak, everything she does stems from a desire to desperately re-create her old life, and she's spent half her life on the train unable to move on from her partner's death]].

** [[spoiler:The Conductor/Amelia Hughes]], while certainly a WoobieDestroyerOfWorlds, also grew bitter and borderline sociopathic over the course of their stay on the train, [[spoiler:manipulating the train's functions to make a GildedCage where she can reunite with her dead fiancé, but also completely ignoring how many passengers were left without the guidance of the original Conductor, prolonging their stay]]. And then there's also the willingness to [[WouldHurtAChild harm Tulip]] [[BadPeopleAbuseAnimals and Atticus]]. Many sympathize with them anyway, with many going as far as ignoring their heinous actions in favor of making them TheWoobie. [[spoiler:This only intensified in Book 3, where she's bettering herself, but still callous and aloof, even towards Hazel. [[ParentalAbandonment A being that she created]]. Many fans choose to believe she becomes a DefrostingIceQueen towards her ward despite taking her for the express purpose of research.]] Book 4 helps greatly with this kinder view of the character, as it shows that [[spoiler:passengers didn't receive anything in the way of guidance prior to her reign either. In fact, One was arguably ''more'' uncaring and aloof about their well-being, while Amelia attempted to make suggestions she thought would improve passenger conditions (such as giving them back their belongings)]], putting into question just how awful their influence actually was on the train.
** [[spoiler:Simon and Grace]] can fall into this, though which one gets the treatment is mutually exclusive depending on how a given person chooses to give "blame" to for the events of Book Three. If one supports [[spoiler:Simon]], then expect to hear cries of how [[spoiler:Grace]] was grooming them their entire life to explain away their actions. If one supports [[spoiler:Grace]], you'll have people saying that [[spoiler:Simon]]'s actions were them and wholly them from the very start. The show itself makes it clear that while [[spoiler:Simon willingly threw away his chances for redemption]], both were enabling and reinforcing the other's bad qualities and vices.

** Spokesperson!Atticus and Actress!One-One. They are only there for a quick joke in Episode 5, but are very memorable for the sheer absurdity of it.

** "Good Guy" and "Bad Guy" from Tulip's game are really just background decoration, but they stuck with fans, to the point that they are official icons on the show's subreddit.
** Randall has gotten a lot of recognition for being a friendly, sentient water puddle who is completely willing to help Tulip catch up with the Cat. Some would've liked to see him as the fourth party member, but that would've been too many characters to juggle. He becomes a recurring character appearing in one of the Train Shorts and an episode in Book 2 and 3.

** While Tuba is billed as a primary character for Book 3, [[spoiler: she only appears for about 4 episodes before being killed off]]. Regardless, she's beloved by the fanbase for her [[UglyCute design]], stoic personality and being a giant gorilla with tubas strapped to her back.

** Multiple questions arose immediately after the pilot premiered concerning the train, its denizens such as One-One, and how Tulip got on the train to begin with, but the biggest one of all was "what does the number on her hand mean?" The most popular theories were that it designated her ranking in a bizarre game or kept track of the Steward's location. Only a handful of people correctly guessed prior to the show's premiere that the number [[spoiler:was basically a direct indicator of her character growth]], with some fans still remaining uncertain about what the number meant until it was explicitly stated the following season.
** After the poster for Book 3 was revealed and the show's creator casually emphasized Hazel's lack of a glowing hand when commenting on a subsequent piece of fanart, many theories sprung up about what this could possibly mean for who (or what) Hazel is. Between being the offspring of a former passenger or a construct of the train, the oddest of these to gain traction was her being the biological child of Grace and Simon, hailing from some sort of [[KidFromTheFuture "future" car]]. It later turns out that [[spoiler:she's a denizen made as the hypothetical offspring of Amelia and Alrick, birthed from a failed attempt of the former at cloning the latter]].
** Given how the main characters of Books 2 and 3 were supporting characters in the seventh episode of the prior season, many fans theorized that [[spoiler:Amelia]] would be the main protagonist of Book 4. This wouldn't be the case, but they would still make an appearance during the season and is heard multiple times throughout.

** While "evil" is debatable, [[spoiler:Amelia]] is still the BigBad of Book 1, was quite beautiful in the past and aged like a fine wine, especially when [[spoiler:[[TheBusCameBack she returned in Book 3]] and showed off that she'd been spending the past few months getting into really great shape]].

* FanartAtFirstSight: The series had an active subreddit and fanart from the initial 5 minute pilot, released over a year before the show was officially released. There were even [[TheyChangedItNowItSucks fan complaints]] when the artstyle changed between the pilot and the show -- some people preferred "pointy-chin Tulip".
* FandomEnragingMisconception: Assuming that Tulip is the main character can be this. As a result of how the show was initially advertised, in addition to how some services continue to list it, a fair amount of people assume Tulip is the show's protagonist. While she does hold the role of main character in the first season, that's also the only season that she appears in; the show is an anthology that follows a different cast of characters in each story arc.

** Also with ''WesternAnimation/{{Amphibia}}'' and ''WesternAnimation/TheOwlHouse'', at least on 4chan's /co/ board, due to their broad similarities in plot structure (teenage girls who star in Western {{isekai}}). Especially ''Amphibia'', which premiered around the same time. Those series being renewed for second seasons ahead of their premieres, while ''Infinity Train'' was just a "five night special event" ([[ExactWords or so they let us believe]]) didn't help things. However, as mentioned below, there are people who watch and enjoy all three.

** {{Continuation}} fics about what happens to passengers after their time on the train, ranging from Jesse and Lake's budding friendship, to [[spoiler:Grace making amends with the Apex for all they've done and telling the Cat about Simon's death]], to Ryan and Min's lives as underground musicians, to [[spoiler:Amelia's life with Hazel and her potential redemption]].

** Speaking of ''Silent Hill 2'', Book 3 can be considered an adaptation of that one given how the main characters of that arc actually fit the characters from Silent Hill 2: Grace is Angela (for having abusive parents and she [[spoiler:later ends up a BrokenBird like Angela does]], Simon is Eddie (a blond Psycopathic Manchild who is in deep denial of his wrongdoings), Hazel is Laura, a blond CheerfulChild who gets along with the Eddie parallel [[spoiler:and ends up broken when her closest friend gets killed]], Tuba is Mary Shepherd due to her bond with Hazel, [[spoiler:and Amelia is James Sunderland who takes in Hazel like the "Leave" ending of implies that Laura will be adopted by James.]]

** The Apex are only seen in four episodes and we know next to nothing about the individual children aside from a few names or the fact that Lucy lost an eye. In fact, we never see what the heck they're doing during Book 3's events while their leaders are separated.

** [[spoiler:Amelia only shows up in Book 3 and has little to no interest in the Apex at all. What would it have been like if she actually ''did'' try to stop the Apex?]]
** [[spoiler:When Grace has to review her memories in "The Origami Car", we never see her actually bringing up the idea of "kill the denizens to get our numbers up". It would've made Hazel's accusations of Grace being a coward and the one who planted that idea in Simon's head ''much'' more impactful if we see her spilling blood.]]

** [[spoiler:As of Season 2 and "The Mall Car", Amelia is now heading towards this direction. While yes, her losing Alrick is horrible and she was in a state of mourning, that does ''not'' forgive the fact that her usurping One-One as the Conductor for thirty three years in order to get what she wanted meant that people are fumbling in the dark trying to figure out how to get off the train and led Grace and numerous kids to see her as a god and equate bigger numbers as a sign of status along with destroying numerous cars and killing its denizens just for some thrills. One-One can't undo what she's done, only help guide new passengers to (hopefully) move forward. Even after she learns about the Apex, she doesn't feel the least bit sorry as to what she caused, doesn't even remember "saving" Grace all those years ago and tears Simon's reality into confetti without doing anything to confine this dangerous youth for both the safety of himself and others.]]

*** In regards to this, one of the games in the "Lucky Cat Car" is where you have Ghoms chasing after a human figure. The Cat, once the partner to Simon, inadvertedly caused Simon to have a fear of Ghoms when one chased after them and she abandoned him in his time of need.
** In "The Mall Car", Grace introduces Simon by saying that she "trusts him with her life". She won't be saying that after what happened in "The New Apex" when he [[spoiler:tried to kill her after she saved his life]].

* SugarWiki/HeReallyCanAct: Isabella Abiera really sells the [[spoiler:sorrow Hazel feels upon learning how Simon murdered Tuba. Even Kyle (Simon's VA) himself stated that this was a very difficult recording session to be in]]. And then she ups the ante in [[spoiler:Tuba's funeral]].

** Book 4's themes of strained friendship, communication problems, forgiveness, chasing dreams, running away from your problems and having a FleshGolem based monster (with it presumably based off a dead passenger) with an arm motif and numerous {{Alice Allusion}}s are very similar to those found in ''Fanfic/InfinityTrainBlossomingTrail'' which was first uploaded around the time of Book 3. Hell, both the fanfic and Book even have a denizen named Morpho (albeit the fanfic depicts them as a fairy whereas the Book has them be a butterfly sheriff)!

** In "The Map Car" MT blushes when the mermaids complimented her hair.

* JerksAreWorseThanVillains: Many of the villains of the show have their fans: [[spoiler:Amelia for being a TragicVillain who only wants to be with her beloved Alrick, the Mirror Police are CreepyAwesome and even Simon gets love for being such a despicable bastard and some pitied how he died after pushing away everyone he ever loved. The same can't be said for Grace's parents, who are emotionally abusive, neglectful, and had a tendency to not take responsibility for how their hands-off parenting is what got Grace onto the Train and become leader of a denizen-slaying cult.]]

** "The New Apex": Two of them involving Simon: [[spoiler:him LaughingMad while he has numbers ''on his face'' or when he is being killed when a Ghom sucks his life out.]]

** Whatever the Apex was doing during the three weeks Grace and Simon was gone is never brought up. The worst they get is [[spoiler:being crushed and suppressed by Simon before a simple question by Grace immediately wakes them up from their brainwashing.]]

** MT can be hard to sympathize with in Book 2. While she ''does'' get a lot of CharacterDevelopment and the show makes clear how much she simply wants to be free from the Mirror World's grip, that isn't really an excuse to [[spoiler:endanger the lives of multiple passengers, such as the old man who was sleeping in his pod or the little girl who was about to get her number. While most of the damage she potentially caused could be easily undone or was even shown to not leave a great impact, she had no reason to be ''this'' [[HotBlooded violent]] or [[ItsAllAboutMe intrusive]] about it]].

* JerksAreWoreThanVillains: Many of the villains of the show have their fans: [[spoiler:Amelia for being a TragicVillain who only wants to be with her beloved Alrick, the Mirror Police are CreepyAwesome and even Simon gets love for being such a despicable bastard and some pitied how he died after pushing away everyone he ever loved. The same can't be said for Grace's parents, who are emotionally abusive, neglectful, and had a tendency to not take responsibility for how their hands-off parenting is what got Grace onto the Train and become leader of a denizen-slaying cult.]]

** It briefly had one with ''WesternAnimation/ThomasAndFriendsAllEnginesGo'' due to the negative reception of the latter, plus it was announced to be airing on Cartoon Network around the time ''Infinity Train'' was canceled and since both shows involve trains, people believed that ''Infinity Train'' had been canceled in favor of ''All Engines Go!''.

** All of Chrome Canyon's compositions for the series, but specifically the main themes for each season. Book 1's "[[https://www.youtube.com/watch?v=J2nWXXdu3RI Running Away]]" crafts an enchanting, otherworldly atmosphere with an underlying feeling of horror. Book 2's "[[https://www.youtube.com/watch?v=RKwsWHuh23o Cracked Reflection]]" is ethereal and dream-like, [[AccidentalPun reflecting]] the strange and fantastic cars awaiting the passengers. Book 3's "[[https://www.youtube.com/watch?v=ReLW269y2xc Join the Apex]]" paints the image of a violent, righteous uprising.

** [[spoiler:"Train To Nowhere" from the end of Book 4 (and the series) is an upbeat song about Ryan and Min-Gi’s time there and a symbol of their renewed friendship.]]

** Tulip. While general opinion on her is somewhat positive, plenty of fans are split on how her character flaws are portrayed, with some thinking that she comes across as way too [[{{Jerkass}} abrasive and whiny]] to be sympathetic, especially in how she deals with her parents' divorce. Others absolutely adore her portrayal, praising her for being a genuinely well-written BadassBookworm and thinking that her abrasiveness and angst are [[AgeAppropriateAngst completely appropriate for a girl her age]].

* BrokenBase: [[spoiler:Did Grace deserve to still lead the Apex after everything she did to them? On one hand, she does deserve to clean up the mess she made but on the other hand she was ''not'' considered parental material at all and they only got to where they were because of her lies and mistakes.]]

** [[spoiler: MT giving Mace his well-deserved death via grinding him on the train's wheels in "The Wasteland." [[https://twitter.com/lindsaykatai/status/1302564264540999682 Even the writers said you were supposed to feel relief at Mace's death.]]]].

** Non-fans are more aware of Tulip's storyline and its elements. Not only were they the most recurring in advertising and promotional material during the show's run, but her season was also the only one other than Book 2 that was available on multiple streaming services for months after the series ended. Said streaming services, and a fair number of official videos on Cartoon Network and HBO Max's [=YouTube=] channels for that matter, also use the synopsis for the first season to apply to the show as a whole.

* SpiritualAdaptation: Many have described ''Infinity Train'' as a LighterAndSofter adaptation of the ''Franchise/SilentHill'' franchise due to the shared premise of surviving and eventually escaping the eponymous EpiphanicPrison -- the Infinity Train basically being a ''much'' nicer version of [[PsychologicalTormentZone the town of Silent Hill]]. The show often draws comparisons to ''Silent Hill'' games with more personal, psychological storylines, in particular the [[VideoGame/SilentHill2 second entry of the series]]. Book 1 is similar to that of ''VideoGame/SilentHillShatteredMemories'' as its main plot involved [[spoiler:Cheryl Mason struggling with accepting that her father is dead and she can't focus on the Frankenstein's monster she made which is a parallel to Amelia trying to create a car that would mimick the past so well and forget Alrick died (Bonus points as both have dark hair.]] Meanwhile, Tulip struggles with her parents and their divorce, which is one of the endings of the same game.

* RelationshipWritingFumble: A mild example: Owen Dennis has claimed that the relationship between MT and Jesse was meant to be a platonic friendship, but they receive so much ShipTease that fans don't exactly have to squint to see something more going on between them. From her blushing around him several times (such as when he promises to bring her off the train with him), to him putting his arm around her and them often standing close together, to lots of HoldingHands and hugging, to Jesse [[spoiler:being ''so'' upset about accidentally leaving the train without her that it ''picks him back up a second time'']], there's enough romantic tension there that MT/Jesse is one of the most popular pairings in the fandom.

** It's never explicitly stated whether [[spoiler:Amelia and Alrick were still only engaged or if they had married by the time of the latter's death]]. Canonically, it's the former, but pretty much every fan depicts them as the latter.

** With ''WesternAnimation/OverTheGardenWall'', another Cartoon Network show with dark elements starring protagonists finding themselves in another world and forced to find a way home and especially how the soundtrack "Old Black Train" clearly references the show. Unlike ''Infinity Train'', ''Over the Garden Wall'' stays confirmed as a miniseries, while the former is continued as an anthology.

* UncannyValley:

** "[[Recap/InfinityTrainS1E5TheCatsCar The Cat's Car]]": [[spoiler:The distorted memories of Tulip's past.]]

** The end of "The Color Clock Car" ramps it up when [[spoiler:Simon kills animal companion Tuba without remorse (although it cuts away before Tuba gets grinded by the wheels)]].

* SpiritualAdaptation: Many have described ''Infinity Train'' as a LighterAndSofter adaptation of the ''Franchise/SilentHill'' franchise due to the shared premise of surviving and eventually escaping the eponymous EpiphanicPrison -- the Infinity Train basically being a ''much'' nicer version of [[PsychologicalTormentZone the town of Silent Hill]]. The show often draws comparisons to ''Silent Hill'' games with more personal, psychological storylines, in particular the [[VideoGame/SilentHill2 second entry of the series]].