Its wheels to the rails for young trainees, Wilson, Koko and Brewster as they prepare for life on the tracks. Theres a lot to learn from Chuggingtons Traintastic Crew including Chuggers; Hodge, Old Puffer Pete and practical joker Emery. Choo Choo! Theres plenty of fun and adventure in store as the trainees prepare a dance routine to celebrate Puffer Petes 150th anniversary and attend Olwins outward-bound training course. Meanwhile, around the depot, Hodges attempt to work unsupervised causes chaos on the tracks and a TV documentary finds Emery launching a bid for stardom!