Following the adventures of three trainee engines, Koko, Wilson, and Brewster, as they learn important lessons like cooperation, perseverance and respect.
Koko and Zephie paint each other's faces using the paint car.
A power failure threatens to melt all of Frostini's ice cream.
Hoot and Toot find Brewster's teaching methods too boring and make their escape.
Action Chugger is making a movie, and Emery lands the job of assisting on set.
When Wilson is stuck underground, he uses Speedy's advice to get himself out.
The wind lifts Hodge high in the air, sailing him all round Chuggington.
Emery goes to an interview with the famous magician, the Magnificent Mysterioso.
Hoot mixes up a delivery of red tomatoes and green apples.
Dr Ling is experimenting with a new invention that can help chuggers increase their speed.
Hodge volunteers to be quizmaster on quiz night, but breaks his axle.
Wilson is given the job of taking photos to be used on a poster promoting Chuggington.
The trainees learn how to use their snowploughs but have yet to experience real snow.
On a snowy day, Harrison tries to plough a huge snowdrift.
Wilson tries to use a new invention called the Scrub-A-Chug, but he makes a huge mess.
Hoot and Toot try to return a meteorite to space.
An ice storm hits Chuggington and Eddie and Emery get stranded out in the cold.
Koko uses her new stunt training skills when she saves Brewster from a runaway wagon.
Wilson and Koko take a shortcut through the ice cave, but Wilson gets stuck.
Hoot and Toot try to help Wilson make his news report, but they get lost in the ice cave.
When Zephie knocks a beehive out of a tree, she and Speedy search for a new home for them.
The newly reopened Border Bridge seems to have become unsafe again.
Koko tries to impress the mayoress, so she can win the Chugger of the Year award.
The defect detector is malfunctioning, so Emery tries to takes its place.
Wilson becomes stuck on the track lift after Hodge tries to fix it.
Koko tries for the high-speed badge, while Emery plays a game with Hoot and Toot.
To get out of track inspection, Toot pretends she isn't feeling well.