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Koko鈥檚 confidence is shaken after she gets in an accident.

Brewster and Zephie learn what makes a real hero.

Wilson is excited about being the new voice of Radio Chuggington.

Mtambo enlists Wilson's help to feed the animals at Safari Park.

Frostini feels left behind and goes in search of his true passion.

Koko has Old Puffer Pete feeling like his old ways are methodical and too slow.

Detective Brewster works to help Wilson find Koko鈥檚 award ribbon.

Koko discovers a new world of Chuggington that glows in the dark.

The trainees try to help Rosa find a job that she will love in her new city.

Wilson and Brewster get caught in the snow and must work together to make their way home.

Wilson's long-time trusted wagon is falling apart!

Koko let her excitement get the best of her and stayed up all night!

Piper loves to play! But when the Trainees are given a job to do, playtime is cut short.

Koko gets a hydraulic power booster upgrade to make her super strong.

Wilson goes for the gold to find out what he鈥檚 best at.

Wilson struggles at being a good chief when he puts together his own Junior Chug Patrol.

An easily flustered Tai must learn how to remain focused, calm and balanced.

The Trainees are on a mission to play top-secret spy games in Chuggington.

Zephie, Wilson and Brewster compete to be Koko's partner in a relay race.

Wilson looks shiny and new after his trip to the Chug Wash!

New to Chuggington, Tai must navigate her way around town to make an important delivery.

Wilson, Koko and Brewster discover a hidden talent for music and form a band.

Hodge鈥檚 radiator is broken and there's no way to order another one.

Chuggington is left in the dark when the lighthouse mysteriously stops working.

The trainees learn that with a little imagination any ordinary job can be extraordinary.

Look up in the sky! Is it a bird? A plane? No, it's Space Chuggers!

Rattling Rivets! The Spooky Chugger has returned!

When a thunder storm comes to Chuggington, Wilson can't control his fear!

Wilson finds out he's the first of his kind. His friends deem him Chuggington Royalty.

Action Chugger has a hard time relaxing.

The twins' bickering has finally led them to separate and go different ways.

An exhausted Wilson must roam Chuggington in search of a new cabin to sleep in.

The trainees set out on a top secret mission.

Koko, Wilson and Brewster give Piper a surprise tour.

Brewster encounters the oldest tree in Chuggington.