Infinity Train is an American animated television series created by Owen Dennis, previously a writer and storyboard artist on Regular Show. As of 2022, four seasons have aired, plus a series of short episodes. The pilot for the series was released by Cartoon Network on November 1, 2016, before being picked-up for a full miniseries due to positive reception, which premiered on Cartoon Network on August 5, 2019. After the conclusion of the first season, Cartoon Network announced that the series would continue as an anthology series. The second season debuted on Cartoon Network on January 6, 2020. The third season began airing on HBO Max on August 13, 2020, with ten episodes airing across three weeks, and the fourth season was released in its entirety on April 15, 2021. The series is set on a gigantic, mysterious and seemingly endless train traveling through a barren landscape, whose cars contain a variety of bizarre, fantastical, and impossible environments. Passengers on the train proceed from car to car by completing challenges which help them resolve their psychological trauma and emotional issues. Every season of Infinity Train (referred to as a "Book", each with its own separate subtitle) follows its own storyline and set of characters, although some characters appear acros... ()