Episode guide
Infinity Train: Book Four: Duet
10 episodes · premiered Apr 15, 2021
Childhood friends with opposing personalities, Mingi and Ryan, dream of becoming rock stars but find themselves on the Infinity Train. They explore the locomotive's inner puzzles — and their own relationship — in order to return home, together.
- Episode 1: The Twin Tapes Apr 15, 2021 · 11m Once great friends, Ryan and Min-Gi's relationship slowly dissolves over the course of years of disgruntlement, culminating with their reunion in the restaurant.
- Episode 2: The Iceberg Car Apr 15, 2021 · 11m Waking up on the train together, Ryan and Min-Gi are met by Kez, whose mistake has left the boys in a predicament.
- Episode 3: The Old West Car Apr 15, 2021 · 11m Arriving in a Wild West town, Ryan, Min-Gi, and Kez attempt to escape the locals.
- Episode 4: The Pig Baby Car Apr 15, 2021 · 11m Ryan and Min-Gi are forced to satisfy Pig Baby with the perfect dessert.
- Episode 5: The Astro Queue Car Apr 15, 2021 · 11m With a growing rift forming between them, Ryan and Min-Gi attempt to convince a bouncer to let them enter the rave.
- Episode 6: The Party Car Apr 15, 2021 · 11m With their instruments back, Ryan and Min-Gi have to play their first show since they were kids, but it's no easy emotional feat.
- Episode 7: The Art Gallery Car Apr 15, 2021 · 11m The boys' disintegrating relationship finally comes to a head when they end up in a haunted art museum with seemingly no exit.
- Episode 8: The Mega Maze Car Apr 15, 2021 · 11m As the duo nears Kez's home, they are forced to contend both with all their enemies and their messy relationship.
- Episode 9: The Castle Car Apr 15, 2021 · 11m Having finally arrived at Kez's home, Ryan and Min-Gi learn of her biggest secret and regret.
- Episode 10: The Train to Nowhere Apr 15, 2021 · 11m Ryan and Min-Gi are forced to face the truth and a final challenge if they ever want to go home.