>>121623389First off, it's not even called the ballroom car, it's the debutante car. Would a person who worked on the show make this kind of mistake? That is debatable.
Secondly the plot is straightforward unless anons are supposed to compare episode 3 to other episodes. The only things to note is a clue of Hazel not being a person when the group is cleared to enter the ballroom only after Simon and Grace learn the dance and that Simon asks Hazel to teach him the song. I think there was an attempt to take people for a ride, but since Infinity Train is getting no other seasons or anything, we will never know.
Thirdly it begs the question. Let's say the train picks someone up in 2000 and that person keeps dying and failing to learn her lesson until 2020. She leaves the train to find that people who knew her are all 20 years older or is she magically aged up 20 years? And what does that mean for people who got on the train 50, 80, 100+ years ago?