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.
| 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.