Koko, Brewster and Wilson are three young, adventurous trainee "chuggers", learning about working on the railway in the town of Chuggington, with the help of the railway controller, Vee, the older engines, and their human friends. Sacha Dhawan, Andy Nyman, Louis Wint, Jacks Dean, Madigan Kacmar, Jordan Reed, Imogen Bailey Added on HBO 2022-06-07.