Infinity train is a grand animation with its own crazy awesome story. The first season, aside from just curiosity I’m sure many went to see it mainly for the corgies but then fell in love with the story and characters.
Season 2 went further into it with “a denizen” known now as Lake. Through this story it showed that the normal humans are really not that different from the living creatures on the train. They all have their own world, problems, situations and emotional process that they go through or could be stuck in. It also showed that with a little fanagaling they could leave the train if they wanted to and just live in a not so dangerous life like the patrons. If you where not already sucked in then season 2 definitely had to get grab your attendtion.
Now season 3 was definitely deeper then what the trailer let on to show. For one it definitely showed that you could stay on the train for... ever if you really wanted to and tried. I can’t even imagine the amount of missing children or missing people reports in general, just cause they needed to go in a full deep personal journey and the train was their chance to deal with it or ignore it. By the looks of it I don’t think people give up the chance to just get on random train that magicaly apperead in front of you from nowhere. Aside from putting them in danger I believe the train also saved many people. For example, if tulip did not get on the train there was a full chance she could have frozen to death.
Sorry getting A little side tracked.....now season 3 was no true surprise when the denizens where being killed again, sad yes but even in season 1 you see some turtles just fly out of the train, it happens. What it did truly show was that the train is not a therapy center, if you don’t put the work to change or even care about just being nice you can stay forever if ya want. Even the false conductor said one-one doesn’t care what you do as long as you do you. It does not help if your sucked in there as a kid and grow up in their with some twisted mentality as your only support system but the denizens can only do so much. They have proven they have there own life’s. Especially when the life sucking dog roaches attack everyone. Now kids usually don’t want to be left alone so it’s understandable that when they saw the chance to go into a secure group of other kids in a new and mysterious place they would jump right on in. Even then nobody is ready to freaking kill another being. Torture denizens yes, but to kill another human who you kinda knew and basically guaranteed some safety nuh uh!!!!
Sometimes you can see the spiral of madness that someone’s in and can’t really do much to help. Other times you are the spiral of madness who want to get out of the cycle or is stuck in their ways so deep you break and pass the no return line. This season showed both and the later, aside from breaking mentally literally died. Did they deserve it?....eeeeeehhhhhh. Was it necessary....yes. The one common thing all the humans do on the train is get better in whatever Scenario, mentality or being they where in. Even season 2 showed if you had enough gusto you would be in an infinite loop until your problem was resolved (don’t know what he did to get back in but also showed you could get back in, that’s another story) and pretty sure you can’t come back from murder!!! Point being full body numeral to the point I’m wondering if it would also go to the organs for space?? 
Ok so this was mainly to talk about season 3 and I might have gone too long..... I feel like I could say more but then it would be season 4 which has yet to reach the viewers number goal to be worked on.

