Infinity Train Season 3 - Cult of the Conductor (2020)

Grace and Simon are the fearless leaders of the Apex, a group of children who are trapped in the train. One day, Grace and Simon get separated from the Apex and end up in a strange cart. They meet Hazel and Tuba in the cart and are determined to bring Hazel back to the Apex. This season uncovers many secrets of the train and shows the denizens of the train in a brand new light. Will Grace and Simon be able to help Hazel and return to the Apex?