Episode Title:
The Number Car.
Episode Description:
MT demands a number from One-One, but they tell her that she is only meant to help passengers, and not actually leave herself. They then discover that Jesse is now back on the train. Examining his memories, they find that he returned home and reconciled with Nate, but was brought back onto the train by his desire to rescue MT. MT wakes Jesse up and One-One puts a new number onto his hand, but it instead becomes ever-changing mathematical symbols. Jesse's need to rescue MT is incompatible with the Train's normal operating procedure, which forbids denizens of the cars from leaving, causing One-One to get stuck in a logical loop...