Book One - The Perennial Child was made available at launch.
Book Two: - Cracked Reflection was made available at June 10th, 2020,
For Book Three - Cult of the Conductor, the show moved to HBO Max, which will premiere as an Max Original on August 13, 2020.
Book 1 focuses on Tulip Olsen, a girl who was upset about her parent's recent divorce, appearing on a strange train that looks as if the train lasted forever with the train cars having very peculiar and bizarre features. She becomes friends with a robot named One-One, and a cute Corgi named Atticus (king of the Corgis). She becomes determined to find out what happens when the number on her right hand goes to 0, find who the conductor is, and how to get off the train.
Book 2 takes place 2 months after the events of Book 1, focusing on Mirror Tulip (Or MT for short), in one of the episodes from Book 1 Tulip freed her own reflection in the Chrome Car, who becomes a fugitive that's on the run from The Reflection Police for not choosing to be Tulip's reflection anymore. She meets a passenger named Jesse and a deer with unusual powers. MT decides to help Jesse get off the train and Jesse wants to help MT escape the train into the outside world in return.
In book 3 during one of Apex’s routine scavenging missions Grace and Simon find themselves separated from their group, and they realize that they’ll have to rely on one another if they want a shot at actually surviving the train’s dangerous cars. Deadset as they are on clinging to Apex’s way of life, when they end up meeting Hazel, an optimistic young girl traversing the train with her gorilla friend Tuba, it isn’t long before Grace and Simon begin to realize that there might just be another way to survive and thrive on the Infinity Train that doesn’t revolve around getting over on others.
- Tulip Olsen (Ashley Johnson)
- One-One (Jeremy Crutchley (Glad-One) and Owen Dennis (Sad-One))
- Atticus (Ernie Hudson)
- MT/Lake (Ashley Johnson)
- Jesse Cosay (Robbie Daymond)
- Alan Dracula
- Grace Monroe (Kirby Howell-Baptiste)
- Simon Laurent (Kyle McCarley)
- Hazel (Isabella Abiera)
- The Cat (formerly) (Kate Mulgrew)
- Steward (formerly) (Ashley Johnson)
- Amelia Hughes (formerly) (Lena Headey)
- Agent Sieve and Mace (Bradley Whitford (Sieve) and Ben Mendelsohn (Mace))
- The Apex
Infinity Train received critical acclaim for its plot, characters, visual animation style and voice acting.