Infinity Train Wiki
Infinity Train Wiki

Book Three - Cult of the Conductor is the third season of the Cartoon Network series Infinity Train. It premiered on August 13, 2020, on HBO Max.

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.[1]

The season's full title was revealed on the Infinity Train panel during Comic-Con@Home 2020.[2]

Cast and Crew

Voice Cast




Image Title Premiere Date No. in series No. in season
The Musical Car.jpeg "The Musical Car" August 12th, 2020 (Sneak Peek)
August 13th, 2020 (HBO Max)
21 1
The kids of The Apex raid a musical car before descending on a village of unsuspecting turtles - but before they can complete their mission, leaders Grace and Simon are separated from the pack under mysterious circumstances.
The Jungle Car.jpeg "The Jungle Car" August 13th, 2020 22 2
Grace and Simon look on the bright side and hope that this will be like a mini-vacation from their responsibilities as leaders of The Apex.
The Debutante Ball Car.jpeg "The Debutante Ball Car" August 13th, 2020 23 3
The gang's uneasy alliance is tested by a challenge in their first car together: dancing in a high-stakes octopus debutante ball!
Le Chat Chalet Car.jpeg "Le Chat Chalet Car" August 13th, 2020 24 4
Stuck in a blizzard, the gang seeks shelter in a nearby cabin. But when Simon realizes who's inside, he frantically searches for a way out.
The Color Clock Car.jpeg "The Color Clock Car" August 13th, 2020 25 5
A giant, color-changing clock creates a shifting-maze puzzle that the gang has to solve before they can leave the car.
The Campfire Car.jpeg "The Campfire Car" August 20th, 2020 26 6
The Apex are just a car away! They're almost home! But first they have to make it through a forest full of pinecone camp counselors.
The Canyon of the Golden Winged Snakes Car.jpeg "The Canyon of the Golden Winged Snakes Car" August 20th, 2020 27 7
The gang finds themselves in a car full of golden winged snakes, but in that dusty landscape a mystery they're unprepared for awaits them.
The Hey Ho Whoa Car.jpeg "The Hey Ho Whoa Car" August 20th, 2020 28 8
In the seemingly innocent Hey Ho Whoa car, a shocking revelation rocks Grace and Simon's world. Will they be able to fix it before The Apex find out?
The Origami Car.jpeg "The Origami Car" August 27th, 2020 29 9
The gang is finally ready to meet The Apex again, but keeping secrets has consequences.
The New Apex.jpeg "The New Apex" August 27th, 2020 30 10
The gang reorders The Apex, but what will the new order be?



  • According to Owen Dennis, Infinity Train was originally planned to premiere on HBO Max from the beginning, but due to the Warner and AT&T lawsuit the streaming service's release was delayed from its original 2019 launch date. This led to the first two seasons premiering on Cartoon Network instead.[4]
  • When Book 1 ended, Book 3 was already in the works.
  • Where Book 1 focused on the mystery of the train and Book 2 focused on an adventure set on the train, Owen Dennis describes Book 3 as a tragedy. Tragedies in the classical sense involve an intense amount of sorrow that befalls the main character, with a key element being it is the choices of said character that, intentionally or not, lead to their downfall. In the case of Book 3, tragedy befalls both Grace and Simon. Grace's actions cause her to ruin her relationship with Hazel and ultimately leads to the death of Simon, her best friend. Meanwhile, Simon rejects the chance to change when it is repeatedly offered to him, ruining his relationship with Grace and dying as a result of his failure to change. Dennis notes that while Book 3's ending is slightly uplifting for Grace, there is still an intense loss felt: Dennis notes that when he watches Book 3 he mostly feels sadness.[5]