Infinity Train Season 1 Episode 4 The Crystal Car Episode Title:The Crystal Car.Episode Description:Tulip, Atticus, and One-One enter a crystal forest car and find the exit door high up on the side of a mountain. A crystal man appears and non-verbally communicates with them, revealing that in order to get to the door, they apparently need to sing an emotional song to a stone so that a staircase will appear. Atticus and One-One attempt to activate it, but their ways of singing are not effective. Tulip sings several emotional songs, but none of them work. Tulip builds a ladder to the door out of crystals, only to find it locked...