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.

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.

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.

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 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!

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.

Everyone loves Frostini, the cool Italian ice cream chugger. Wilson wants to be just like him, so he's especially excited to learn that Frostini needs a helper for the school holidays. Brewster and Wilson compete for the position by doing a trial ice cream delivery round. Wilson imitates Frostini, but the children aren't impressed by his over confident attitude.

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.

Children from Chuggington School are coming to the Safari Park, and Mtambo is training Wilson and Brewster to help out as junior guides. Mtambo tells them it's important to pay close attention to what he tells them about the animals, as they in turn will have to pass on the facts to the children - who will be tested afterwards to see how much they've learned.

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.

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 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.

Old 'Picky Nicky' Inspector Nicholas is coming to conduct Chuggington Depot's annual inspection. The chuggers swing into action getting things ready. Emery has a day off and really wants to help. He bosses everyone about and generally gets in the way. An exasperated Vee sends him to the station to wait for the Inspector. Emery finds a young woman there.

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.

Koko and Brewster are going to the forest to pick up some wood and take it to the paper mill. Wilson wishes he could go, but he has to pick up a roll of special paper for the printers. In the forest, Brewster and Koko start to play and unknowingly break a water pipe that gushes everywhere. Hearing it, Koko thinks it's a waterfall.

Brewster delivers some feed to the Safari Park, and hurries back to practice today's task - picking up mail sacks - unaware that he has a monkey stowaway onboard! Back at the depot, someone - or something! - is causing mayhem. Methodical Brewster's questioning mind comes in very handy when he turns detective.

The trainees are learning to use the paint wagon. Wilson has trouble concentrating, so while Koko and Brewster learn how to mix colours, Puffer Pete takes Wilson to Old Town for some extra painting tuition. Wilson is great at doing wild, artistic designs, but Pete says he also has to learn how to paint with control. With Pete encouraging him, Wilson does it!

Vee announces that the King of Buffertonia is coming for a tour of the Safari Park. Mtambo wants to give the best tour ever, so he does a practice run - with Hodge pretending to be the king. Mtambo is ready to give his royal tour when he learns that the King won't be coming because he has been trapped in a landslide. Mtambo is devastated.

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.

Brewster is so excited about seeing the new Action Engine movie today at the ride-in movie theatre. But Irving gives him the job of taking tin cans to the foundry for recycling. Brewster worries that he'll never be back in time for the film - unless he can be as speedy as his Super-chugger hero! Brewster charges off and gets caught up in pretending to be his hero.

Hodge wants to be more independent, but Eddie never lets him do jobs on his own. So when Wilson startles Hodge, causing him to accidentally break a junction box, Hodge decides to deal with it himself. Using the crane, he jams the wires back in and shuts the doors. Easy. But then strange things start happening. Lights and signals stop working, Vee malfunctions and chuggers are sent to the wrong destinations. Hodge and Wilson realize it must have something to do with the box they broke! If Eddie finds out, he'll never trust Hodge to do anything on his own again - but if Hodge doesn't tell him, it could take Eddie days to figure out what's wrong. Hodge finally musters up his courage and confesses. A relieved Eddie fixes the box. Eddie promises he'll let Hodge do more jobs by himself and Hodge promises to tell Eddie straightaway when things go wrong.