Wilson saves Koko from a collapsing mine, proving that he is the brave new hero of the rails.

When Koko sees the pretty design that Lori has painted on Zephie??s face, she decides she wants one too and the two of them compete to see who can get the biggest and best design. Lori??s too busy repainting rolling stock in the automated spray shed to help, so Koko and Zephie decide to paint each other using the paint car.

It's a windy day in Chuggington, which is causing lots of problems. Eddie has a list of jobs as long as his arm! Hodge really wants to help. Some fencing needs to be delivered, but the hooks that hold the tarpaulin down over the load are missing. As Eddie dashes off to yet another job, he asks Hodge to pick up some more hooks. Farmer Felix is anxious to get his fencing before his animals escape. Not realising he actually needs the hooks to keep the tarp secure, Hodge decides it would really help if he took the fencing with him on his way to pick them up. On his travels, the wind works the tarp loose. It affixes itself to Hodge, turning into a kind of sail. It whizzes Hodge along and lifts him high in the air, sailing him all round Chuggington. Eventually it drops him back in the depot. When Eddie learns that Hodge has inadvertently fixed everything on his 'to do' list in the process, he thinks Hodge should sail away more often!

Wilson and Koko are having loads of fun racing each other - until Wilson damages his wheel! He's scared of going to the repair shed to get it checked out, so he tries to put on a brave face and ignore the problem - despite Koko and Brewster's protests. When he gives Felix the Farmer and his churns of fresh cream a ride to the market, Wilson's condition worsens.

The trainees are heading for a lesson with Dunbar in the training yard when an underground tunnel catches Koko's eye. She wants to explore it but Vee says she isn't ready yet. Dunbar is called away from the lesson about switching tracks before they barely get started. With time on her wheels, Koko decides she's going to see where that tunnel goes.

The trainees are playing hide-and-seek - and everyone has to admit that Wilson is the best hidey-chugger ever! The trainees' game is interrupted for a lesson: learning how to do different emergency stops with mud, leaves and water on the rails. Wilson is in heaven, as he likes nothing better than getting dirty!

Dr. Ling is giving a talk about meteors and how, many years ago, one crashed right near this area. Brewster pulls in a real meteorite, borrowed from the museum. Dr. Ling demonstrates that you can move the meteorite with a magnet, as meteorites contain metal. Hoot and Toot are afraid the meteorite might escape and destroy Chuggington, so they decide to return it to space.

When Harrison breaks down, Koko volunteers to replace him on the night shift, determined to make the fastest run ever. But Vee insists that Wilson and Brewster go too, despite Koko's protests that Brewster will slow them down. Koko races off, teasing Brewster about being a 'slowcoach.' Suddenly she shudders and slows to a stop and Brewster and Wilson overtake.

Dunbar has some news, he's leaving Chuggington to do some traveling. Brewster is very sad to see Dunbar go so makes him promise to say goodbye before he leaves. Skylar is going to be the trainees new trainer, he's fresh from the training academy. He starts with some crane training and explains it's all about focus and flow.

Wilson is determined to get his Animal Transportation badge by taking Ebo the elephant to his new home in the Safari Park. But the naughty elephant has other ideas! He causes mayhem by throwing fruit and grabbing onto low hanging branches. To top it all, he uses his trunk to uncouple his car and escape! Poor Wilson chases after the mischievous elephant, who leads him down an overgrown track.

Koko challenges Wilson to see if they can stay awake all night! Morning comes, and Wilson declares himself the winner - just as Vee gives him a job for the day: he's going to be collecting the mail and taking it to the sorting office. While Koko sleeps in, poor Wilson struggles to keep his eyes open.

Koko challenges Hodge to a competition: whoever does the most jobs that day wins! But it has to be a secret. Hodge can't even tell Eddie. Hodge hurries off, eager to get started. Meanwhile, Eddie's having a little trouble tuning the electric guitar he found and wants to fix it. Hodge, desperate to win the competition, runs Eddie all over town instead, doing jobs that don't really need doing.

It's time for the annual Chugger Championship Race - and speedy Koko is sure that the big, shiny trophy is hers! She's so determined, she spends hours practising and doesn't have time for anything else. Wilson thinks that the race is more important to her than her friends and the two of them fall out. When Wilson breaks down during the race, Koko must choose whether to help him.

Koko finds a lost puppy and wants to keep it. Convinced she can look after him and practice the new task - delivering newspapers - Koko soon runs into trouble. Zoomy needs lots of attention, food and walks. With all the extra work, Koko will never be able to get the hang of the throwing arm to deliver the newspapers into their boxes!

The trainees are going to be fetching and delivering building supplies today. As they're working, Brewster sees a builder flip his clipboard in the air. Wow! He's never seen anyone do that before! Wilson wonders what's so special about that. Brewster introduces Wilson to his new hobby: people-spotting. Before long, Wilson is hooked too, and the two trainees get a bit competitive.

The trainees are having an exciting stunt training session with Action Chugger, when he is called away to do some filming. As he leaves, Action Chugger invites Brewster and Koko to come down to the film set later to demonstrate the skills they have learned. But Brewster gets called on a long run to Tootington and has no time to practise. Koko goes with him to keep him company.

A storm has left the Safari Park in a bit of chaos, and some animals have escaped! Emery teases Brewster, saying one of the escapees is a dragon. So when one of the fugitives - a golden bell frog - makes his home in a tunnel that amplifies his distinctive 3-note croak into a mighty roar, the trainees are convinced that Emery is right!

The trainees are taking their passenger test. If they pass, they'll be able to carry passengers all on their own. Brewster and Wilson are a little nervous, but Koko is confident - after all, she's a passenger train! Mr. Simkins, from the Ministry of Chuggers, arrives to examine them. His 'jiggleometer' will tell him whether or not the trainees are riding smoothly. Koko volunteers to go first. Unfortunately, just as she starts, Simkins coughs and sets the machine off with a deafening beep. Koko jumps and Simkins gets thrown across the carriage. He fails Koko and, despite her protests to be given a second chance, is unmoveable. Broken-hearted, Koko goes off to the recycling yard and pours her heart out to Irving. Irving remembers Simkins of old and intervenes - reminding him of a similar situation in his own past. Simkins relents and gives Koko another chance! This time, without the jiggleometer, Koko passes with flying colours!

Zephie has never worked in the Safari Park before, so she's excited to be taking the vet, Dr. Gosling, to give the animals their checkups. Emery teases her, saying she'd better watch out for the monkeys. They might pull her wipers or steal her bell! Zephie gets worried. When Dr. Gosling says he'd like to start with the monkeys, she asks if they can do the giraffes and elephants instead.

Mtambo's in a bit of a rut giving the same old tours everyday in the Safari Park. He wants some adventures in his life so that he has new stories to tell. One of Mtambo's passengers, Freddy, says that he's about to head off on a jungle expedition. Freddy asks Mtambo to watch his camera gear while he goes to the souvenir shop. Mtambo makes up his mind to ask Freddy for a job when he returns.

Eddie is having a very busy day and Hodge really wants to help - but all the jobs need hands not wheels. When Wilson reports the track lift is malfunctioning, Hodge decides to try to fix it himself. He only makes matters worse, bringing the lift to a grinding halt with Wilson stuck on it! Eddie agrees to let Hodge go and fetch the lift part needed, as long as he uses Dr Ling's Chugnav to guide him on his journey. Unfortunately, Action Chugger has knocked the satellite, which has skewed the signal, leaving the Chugnav talking utter nonsense! Hodge figures out that the satellite must be broken - so Action Chugger takes Hodge on an exciting trip into space to fix it. Hodge finally gets to help out!

The trainees are doing a sign-reading exercise. If they work as a team and follow the signs correctly - there'll be a wonderful surprise at the end of it. The trainees start off together, but Koko and Wilson quickly lose patience with Brewster - he's so methodical, that it's slowing them up! The friends have a bit of a falling out.

Calley is teaching Hoot and Toot how to use the sliding turntable. When she gets called away on an emergency, she asks Brewster to take over the training. The twins find Brewster??s methodical way of teaching a bit boring and make their escape. Brewster chases them all over the depot. The twins accidentally get on the track lift, which sends them straight underground.

Wilson has been given the important job of bringing the refrigerated ice cream cars from the ice cream factory to the Ice Cream Tasting Fair. The refrigeration cars are heavy, so he'll have to take them one at a time. Wilson makes the first trip successfully, but when his hero - cool ice cream chugger Frostini - offers to give him a tour of the factory, he forgets all about his important job.

Wilson is assisting Frostini as he creates a new flavour for the mayor's banquet: Chugstastic Chewy Cheesecake! But they discover that the mayor's wife is allergic to cheese. Frostini will have to come up with something else by tonight! Wilson tries to help, but ends up causing the mixing machine to explode covering everything in ice cream. Annoyed, Frostini sends Wilson to the chugwash.