Tulip, a headstrong 13-year-old girl, finds a mysterious train where every car contains its own universe.

Tulip strikes a deal with a cat in an attempt to get home, but is the price worth it?

Tulip and One-One explore a car full of Corgis and face off against a mysterious monster.

Tulip, Atticus and One-One enter a crystal forest car and have to take part in a musical ritual.

Tulip has to face her past.

The gang enters an unfinished train car and tries to fix it.

The gang meets a familiar face in a mirrored car.

The gang is confronted by a strange new force on a Ball Pit Car adventure.

Tulip takes a risk trusting an old foe.

Tulip makes it to the front of the train and is faced with a choice.

Mirror Tulip tries to create a new life for herself outside the Mirror World.

Mirror Tulip and Jesse climb down a real life family tree.

Mirror Tulip tries to help get Jesse’s number down.

Mirror Tulip and Jesse get stuck in a car and face an unusual dilemma.

Mirror Tulip and Jesse gain an unexpected companion.

Mirror Tulip and Jesse enter a carnival car and have to compete for the exit.

Someone mysterious invites Jesse and Mirror Tulip into a mall car.

Mirror Tulip finds herself in the wasteland outside the train.

Mirror Tulip searches for answers.

Mirror Tulip fights for the right to make her own choices.

The kids of The Apex raid a musical car before descending on a village of unsuspecting turtles - but before they can complete their mission, leaders Grace and Simon are separated from the pack under mysterious circumstances.

Grace and Simon look on the bright side and hope that this will be like a mini-vacation from their responsibilities as leaders of The Apex.

The gang's uneasy alliance is tested by a challenge in their first car together: dancing in a high-stakes octopus debutante ball!

Stuck in a blizzard, the gang seeks shelter in a nearby cabin. But when Simon realizes who's inside, he frantically searches for a way out.

A giant, color-changing clock creates a shifting-maze puzzle that the gang has to solve before they can leave the car.

The Apex are just a car away! They're almost home! But first they have to make it through a forest full of pinecone camp counselors.

The gang finds themselves in a car full of golden winged snakes, but in that dusty landscape a mystery they're unprepared for awaits them.

In the seemingly innocent Hey Ho Whoa car, a shocking revelation rocks Grace and Simon's world. Will they be able to fix it before The Apex find out?

The gang is finally ready to meet The Apex again, but keeping secrets has consequences.

The gang reorders The Apex, but what will the new order be?

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.

Waking up on the train together, Ryan and Min-Gi are met by Kez, whose mistake has left the boys in a predicament.

Arriving in a Wild West town, Ryan, Min-Gi, and Kez attempt to escape the locals.

Ryan and Min-Gi are forced to satisfy Pig Baby with the perfect dessert.

With a growing rift forming between them, Ryan and Min-Gi attempt to convince a bouncer to let them enter the rave.

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.

The boys' disintegrating relationship finally comes to a head when they end up in a haunted art museum with seemingly no exit.

As the duo nears Kez's home, they are forced to contend both with all their enemies and their messy relationship.

Having finally arrived at Kez's home, Ryan and Min-Gi learn of her biggest secret and regret.

Ryan and Min-Gi are forced to face the truth and a final challenge if they ever want to go home.