Old Puffer Pete has been working in Chuggington for 150 years, and the mayor wants to commemorate his anniversary with a special show. The trainees are going to do a carefully choreographed routine - but it all goes wrong. Wilson doesn't listen, Koko goes too fast, and Brewster doesn't seem to know his right from his left!

Vee needs someone to pull the royal carriage for the prince of Buffertonia. Chuggers race in to get the job, but Harrison is first - thanks to cutting some corners and running a red light or two. Happy to have the job, he goes off with Puffer Pete to learn the route. Pete notices that Harrison has got into some bad habits. He takes shortcuts, ignores signs and breaks the speed limit.

Action Chugger is in town making a movie and Emery lands the exciting job of assisting on the film set. Brewster is a little envious, especially as his job for the day is litter-picking. He worries that his fellow chuggers think he??s a bit dull. Calley tells him that a job is what you make it and shows him that the litter-picking wagon can do some cool things.

Nobody wants to go down the mine to collect the rolling stock for cleaning, so Speedy suggests they settle it with a chug of war! Two teams will face each other across a bridge with a piece of rolling stock between them. The first team to pull the rolling stock off the bridge is the winner and the losers will clean the mine. Harrison captains one team, Speedy the other.

Hoot and Toot are double ended shunting chuggers. Hoot gets fed-up of Toot always being at the front, so Toot agrees to let him lead for the day. Hoot mixes up a delivery of red tomatoes and green apples. He also refills the spray shed with the wrong colour paint and Wilson is sprayed green instead of his usual red! Toot is upset with Hoot for getting everything wrong.

Dr Ling is experimenting with a new invention that can help chuggers increase their speed - the Booster! Brewster helps her to test it. The new booster makes him go super-fast, but it has some terrible side effects. Brewster gets a lot of attention and loves being thought of as a speedy engine, so he says nothing about the problems.

Hodge loves Chuggington Quiz Night – so when quizmaster Harrison loses his voice, Hodge volunteers to take his place. But he has a really busy workday with Eddie and doesn’t get any time to think up his questions. To try to save time, Hodge overloads himself and breaks his axle. Because Hodge is one of a kind, they won’t be able to find a replacement in time for him to host the quiz.

The trainees are learning how to use their snowploughs, snow horns and snow lanterns, but have yet to experience real snow. When a blizzard comes in, it's all chuggers to the rails! Wilson goes out with Harrison, promising to stick very close to him. Unfortunately, he gets distracted by some children building a snowman, and falls behind.

It’s a cold, snowy day in Chuggington and every available chugger is heading out to plough – except for Chatsworth, who is going for a rest after ploughing all night, and Hoot and Toot, who are too inexperienced to be out in the snow. Koko and Harrison head off as a team, Harrison boasting there isn’t a drift that can stop him!

Eddie and Hodge have cleaned the sludge out of the chugwash. Now they’re going to refill the chugwash soap, then clean the underground tunnels using the Scrub-A-Chug – a fantastic piece of rolling stock with brushes that cleans the ceiling of the tunnel. Their work is interrupted when they get called away on an emergency.

An ice storm hits Chuggington and Koko really wants to help. She sees her chance when she comes across one of the anti-freeze cars. She thinks she's de-icing the tracks, but she's actually making them even icier - she doesn't realise that the car contains water. Because of her actions, Eddie and Emery get stranded out in the cold. Koko admits her mistake and does what she can to help Calley rescue them. When Eddie and Emery are back, safe and warm, Koko promises she'll never do anything like that again without checking with someone first!

On an icy winter's day, Wilson and Koko are sent out to sand the tracks in the mountains. They take a short cut through the ice cave. Koko does everything properly, but Wilson doesn't keep his mind on the job, as he has fun exploring. He doesn't realise that an icicle has fallen into his sand wagon, wetting the sand and rendering it useless. He's stuck! He figures out a way to dry the sand by using the heat from his engine and makes it back to the depot - after finishing his job, of course!

Border Bridge is re-opening and Wilson has been given the special job of using the new 'rolling reporter' car to make a live report, which will be broadcast on Vee's boards all over Chuggington. Wilson takes the car out to practise and comes across Calley training Hoot and Toot. When an emergency call comes in, Calley asks Wilson to look after the twins. They offer to help Wilson practise his report, but instead, they run off with the camera car and end up lost in the ice cave. Happily, the camera is transmitting, so using Vee's boards, Wilson is able to track them. He rescues them and the car and manages to get to the bridge just in time - and Rolling Reporter Wilson is on the air!

It's another glorious day in Chuggington and Zephie is keen to enjoy the sunshine, but every job she is given is underground. Meanwhile Speedy is out in the countryside serving drinks with the juicer wagon, when he'd rather be doing a proper job at the depot. They agree to swap jobs. While trying to operate the juicer, Zephie accidentally knocks a beehive out of a tree. The bees swarm into Zephie's carriage, looking for a new home. Speedy comes to her rescue and together they find the bees a new, safe place to live.

The defect detector is a device that lets Vee know if there's anything wrong with chuggers as they pass by its scanners. Unfortunately, it seems to be malfunctioning! Eddie takes it off to the repair shed and Emery, wanting to be helpful, takes its place. But, worried that he might miss something, Emery sends nearly everyone to the repair shed, creating chaos in the depot! Emery feels bad that he's caused so much work for Vee and wishes he could make up for it. He has an idea. If the detector could talk, it wouldn't have to do everything through Vee. Dr Ling and Eddie think it's a great idea and they update the detector so that it speaks. And they know the perfect voice to use Emery's!

Koko decides to try for the High Speed badge - something no trainee has ever won. Emery wishes he still earned badges like the trainees do. For fun, he plays a 'pretend badge' game with Hoot and Toot, where they award each other imaginary badges. Emery is so busy playing his game that he doesn't listen when Vee assigns him to take some supporters to the footbridge to cheer Koko on. Realising that he was so wrapped up in his pretend badge game, he forgot how important the real badge was for Koko, he takes it upon himself to be her number one cheerleader. Koko is flagging, but with Emery's encouragement, she bursts through the finish line! Emery learns that he doesn't need badges anymore - it's enough to know he's done a good job.

Toot doesn’t want to do track inspection with Hoot. To get out of it, she pretends she isn’t feeling well. At first she enjoys getting lots of attention, but when Morgan thinks her flywheel needs replacing, which means having her engine taken out and spending the night in the repair shed, Toot realises she’s gone too far.

Wilson is asked to take Mayor around town but he forgets the passenger car. Hoot & Toot are given a Gold Wheel for delivering a passenger car to Wilson without being asked. Gold Wheels are awards for doing something extra special without being asked. Hoot & Toot try to teach themselves how to use the different wagons to earn another gold wheel but they make a huge mess!

Wilson picks pumpkins for Frostini's harvest festival pumpkin ice cream. Hoot & Toot are Frostini's special helpers too, Wilson doesn't want to share the job. He speeds off with the ice cream and goes so fast the ice cream falls in the stream. There are no pumpkins left! Hoot & Toot get lost in the forest while trying to find cream.

It's a scorching day in Chuggington and there's a Rollo show to parade the latest wagons in front of all the chuggers. Chatsworth directs the chuggers and makes them practice their moves. Hodge can't wait to see latest wagon, he doesn't want to be late for the show but Eddie thinks he's overheating.

The trainees are playing "Hidey chugger" in the Roundhouse Park when Koko comes across Hodge playing a chugnav game. Koko wants to beat Hodge's top score, she forgets about Wilson and Brewster and goes off to try and complete all the levels of the chugnav game. Old Puffer Pete has broken down, Vee asks Koko him back to the depot but the game distracts her and she forgets all about him.

Zephie delivers the new spray head to Lori and gets stars painted on her face as a reward. When Emery sees her, he wants one too but Zephie says he must do something special to be in her Star Club. Wilson tries to something special too much Zephie isn't impressed. Hoot doesn't make it in the club but Toot does. Lori paints two suns on Wilson and so now he's in Wilson's Sunshine Club.

Action Chugger's staring in a new movie, he's going undercover as a ordinary chugger. He needs to practice for the role so disguises himself so the other chuggers can't recognise him. The disguise isn't working very well as everyone knows who he is. Action Chugger tries to help the ordinary chuggers as they don't have super hero powers but he ends up making a mess and annoying them.

Brewster overhears the Mayor is interviewing Action Chugger about "Sky High Flyer", a film about making the most of what you have. Brewster wants to be a film maker too so offers to help the Mayor by making a film for her presentations about who puts the chug in Chuggington. Things don't quite to plan as he can't find anything exciting enough to film.

While delivering some special equipment to the safari park, Mtambo asks Koko if she can keep a secret. Tonight, they are hoping to catch a very rare site on camera, a luna dance performed by the bats to a special bird song. Dr Gosling wants Koko to record the sound but she's can't tell anyone about it, they need the safari park to be completely silent or they might scare the bird.