Following the adventures of three trainee engines, Koko, Wilson, and Brewster, as they learn important lessons like cooperation, perseverance and respect.
Vee rewards Hoot and Toot with a gold wheel, but they get greedy.
Wilson tries to do everything himself, with disastrous consequences.
Hodge breaks down on the way to the rolling stock show.
Wilson camouflages himself as a parrot and scares all the animals.
Koko gets hooked on a computer game trying to beat Hodge's high score.
Wilson becomes magnetised and attracts a lot of unwanted attention.
Zephie causes division amongst friends when she is selective about who can join her club.
Action Chugger discovers that it is hard work without his superpowers.
The Mayor asks Brewster to make a film about Chuggington.
Koko is told an important secret and struggles to keep it to herself.
Toot is very jealous of the attention everyone gives to Piper, a new trainee.
The trainees compete to be in Skylar's Squad, a new rescue team.
Piper finds out the hard way that she has a lot to learn.
Brewster is not happy when Skylar replaces Dunbar as teacher.