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Season 4

Book Four: Duet

This season is locked. New artwork may be added.

Book 4 will now follow two old friends with dreams of becoming rock stars who find themselves on the Infinity Train. They must explore the locomotive's inner puzzles — and their own relationship — in order to return home, together.

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  • TheTVDB.com Season ID 1908261
  • Created September 23, 2017
  • Modified April 1, 2024
When available, episode names will be translated into your preferred language. Otherwise they will be shown using the series' origin language.
Name First Aired Runtime Image
S04E01 The Twin Tapes
April 15, 2021
HBO Max
11
S04E02 The Iceberg Car
April 15, 2021
HBO Max
11
S04E03 The Old West Car
April 15, 2021
HBO Max
11
S04E04 The Pig Baby Car
April 15, 2021
HBO Max
11
S04E05 The Astro Queue Car
April 15, 2021
HBO Max
11
S04E06 The Party Car
April 15, 2021
HBO Max
11
S04E07 The Art Gallery Car
April 15, 2021
HBO Max
11
S04E08 The Mega Maze Car
April 15, 2021
HBO Max
11
S04E09 The Castle Car
April 15, 2021
HBO Max
11
S04E10 The Train to Nowhere
series finale
April 15, 2021
HBO Max
11

No artwork of this type.

No artwork of this type.

No artwork of this type.