Infinity Train — Book Four: Duet
10 episodesFirst aired 15 April 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.
E1The Twin Tapes
9.7Apr 202111m
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.
E2The Iceberg Car
8.5Apr 202111m
Waking up on the train together, Ryan and Min-Gi are met by Kez, whose mistake has left the boys in a predicament.
E3The Old West Car
8.5Apr 202111m
Arriving in a Wild West town, Ryan, Min-Gi, and Kez attempt to escape the locals.
E4The Pig Baby Car
8.0Apr 202111m
Ryan and Min-Gi are forced to satisfy Pig Baby with the perfect dessert.
E5The Astro Queue Car
9.5Apr 202111m
With a growing rift forming between them, Ryan and Min-Gi attempt to convince a bouncer to let them enter the rave.
E6The Party Car
10.0Apr 202111m
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.
E7The Art Gallery Car
10.0Apr 202111m
The boys' disintegrating relationship finally comes to a head when they end up in a haunted art museum with seemingly no exit.
E8The Mega Maze Car
10.0Apr 202111m
As the duo nears Kez's home, they are forced to contend both with all their enemies and their messy relationship.
E9The Castle Car
10.0Apr 202111m
Having finally arrived at Kez's home, Ryan and Min-Gi learn of her biggest secret and regret.
E10The Train to Nowhere
10.0Apr 202111m
Ryan and Min-Gi are forced to face the truth and a final challenge if they ever want to go home.
