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. Chuggington is a British computer-animated television series for children produced by Ludorum plc and on the BBC children's channel CBeebies in the UK and Disney Channel and Disney Junior in the US and other 175 territories throughout the world.