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 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.

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.

Wilson and Brewster are sent to get stone from the mountain quarry. Brewster is in a hurry to get the job done, so that he can get back and practise some new moves in the training yard with Koko. For once he doesn't slow things down by asking questions, and he doesn't hear Dunbar warning them to be extra careful on the way back, as going downhill with a heavy load is harder.

Part of the track is out, and there's chaos in Chuggington! Vee needs Eddie to repair the track - but he's late for work again. Hodge prepares the electro-magnetic crane and the replacement track so they will be ready to go as soon as Eddie arrives. Wilson persuades Hodge that he could do the repairs by himself and save Eddie from getting in trouble. Hodge doesn't think so.

Koko has her first big solo delivery job, picking up timber and delivering it to the paper mill - that is if Old Puffer Pete gets out of her way! In spite of Pete's admonition to 'take it slow and steady,' Koko speeds toward the timber yard, nearly ploughing into a family of squirrels! On her return she encounters the squirrels again - but this time she has to make an emergency stop.

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!

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 how to use ice-cream cars today, and will be trying for their Ice-Cream badges. The great Frostini is going to test them on their skills. When Wilson's car breaks down, Puffer Pete comes to the rescue, pulling out his old steam driven ice cream wagon from the back of the rolling stock store - where it has sat for thirty years.

Koko is yearning for adventure - and she just might get it, as today the chuggers are making deliveries out of town. But Vee asks Old Puffer Pete to accompany them - and he's so SLOW. They always have to wait for him to catch up - and he's always letting off those embarrassing bursts of steam! During their travels, they come across a mysterious old spur track. Pete tells them it leads to Old Chuggington, which is now a ghost town. The trainees decide to explore the old town on their own and get helplessly, hopelessly lost. When Wilson accidentally sets off the old Chuggington Central Whistle, Pete puffs his way through the maze of tracks to investigate. He rescues the youngsters and takes them on a fascinating tour of the old town, which he still knows like his own pistons! The trainees realize that Pete isn't such a fuddy duddy after all and there's a lot that they can learn from him.

Eddie lives so far away from Chuggington that he just can't seem to get into work on time. After getting into trouble with Morgan yet again, he decides to sleep at the depot, to be sure to be on time. But Calley's emergency callouts keep him awake all night, and he oversleeps. Late again! Hodge and the trainees try to find a new home for Eddie in Chuggington.

The chuggers are learning to carry passengers comfortably, using dummies specially made to wobble if the ride isn't silky smooth. Dunbar will test them at the end of the day. Koko and Brewster take to it easily, but poor Wilson struggles. He goes off to practise by himself in the park, but things don't go well.

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.

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.

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!

On her way to see a lamb at the farm, Zephie gets lost! She shouts for help and rings her little bell, but no one hears her. Morgan fits her with a siren so that she can call for help if it ever happens again. Zephie falls in love with her new accessory and can't resist playing with it and setting the siren off - much to the annoyance of the other chuggers.

Twiga the giraffe is going to have a baby! An excited Koko has been given the job of keeping watch overnight, and fetching Dr. Gosling, the vet, if Twiga goes into labour. That night Mtambo (the safari tour guide train) tells Koko all about nocturnal animals. Koko learns how they use their senses to get round in the dark. When Twiga goes into labour, Koko goes to fetch the vet.

Olwin takes every group of new trainees out on an outward bound training course. She teaches them navigating skills to be used in the event of bad weather or emergencies. Brewster, Wilson and Koko are really looking forward to it - until Zephie and Hodge tell them how Nanny Olwin will treat them like babies the whole time! And she does.

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!

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.

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.

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!

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.

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.

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.

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.

Zephie is given the important job of transporting newspaper reporter 'Rag' and photographer 'Snap.' They're doing a story about Morgan's new rail-going cycle, which Zephie isn't happy about. It's her job to take Morgan places! She feels threatened and wonders if she should find a new job. Rag lets her wear his press pass just for fun, and forgets to retrieve it.

The chuggers have often told Emery that he is so funny, he should be on the stage. So when a TV crew comes to make a documentary about Chuggington, Emery sees his chance for stardom. The TV crew love how he jokes about the other chuggers - and they decide to have him do the narration for the documentary.

The trainees are trying their wheels at pulling rolling stock around an obstacle course. Ambitious Wilson tries the fire wagon. The course seems easy - until Dunbar tells them they have to do it backwards! Wilson goes first, but makes loads of mistakes. Discouraged, he slopes off and bumps into Harrison, who gives him a tip: he should drop down a gear for more control. Great!

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.

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.

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.

Dunbar and Nurse David from Chuggington Hospital are teaching the trainees how to use the ambulance car. Shouting over the noise of the siren, Dunbar loses his voice. Morgan can't find out what's wrong, but he suggests that Dunbar rest. Inspired by his lesson, Wilson decides to nurse Dunbar. Unfortunately he's a little too attentive, but Dunbar doesn't have any voice to tell him to go away!

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.

Chatsworth has had a very busy day and wants a quick snooze, but everything and everyone conspires to keep him awake. First the trainees are playing loudly in the park - and then Vee calls him out on another long job. Meanwhile, at the quarry, Harrison unknowingly gets some rocks trapped in his engine.

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.

Calley is doing emergency rescue training with the trainees. If they do well, they'll earn a badge. Calley takes them to her underground chamber to show them all of her emergency rolling stock and the computer that tells her when a chugger is in trouble. Then they go out into the country to do some practical exercises. Calley asks Brewster to pretend to rescue Zephie.

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!

The depot clock is broken, and the schedule is in chaos! Eddie needs to go to Old Town to see if he can borrow a part from the old clock to repair the depot clock. Hodge gives him a lift, as he's taking the chugscan back to the factory because it's spouting gibberish. Meanwhile, Olwin takes the trainees to Old Town, and on the way tells them about the Old Town Mystery Chugger.

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.

Dunbar has a new training device: a voice-operated storm simulator tunnel, which simulates wind, rain and fog. It's programmed to respond only to Dunbar's voice. Wilson particularly loves battling the wind. Dunbar says that in real conditions, it's best to couple up to another chugger as the added weight gives control.

Puffer Pete's firebox is completely worn out and he can't move without it. It's going to take ages to have a new one made. Until then, Pete is stuck and can't move by himself. Meanwhile the trainees are playing hide and seek in Old Town. Brewster hides in a shed. When he emerges, he's covered in bits of old junk. Koko and Wilson think it's funny!

The trainees are thrilled to be spending the day training with Action Chugger. He puts them through some intensive stamina exercises, but Wilson just wants to get to the bit where they use jetpacks and fly. Action Chugger laughs and tells him that there is much more to being a super chugger than flying. Brewster is the first to have a go on a flight simulator.

Zephie admires the 'big' chuggers, and wants to pull freight just like them. Brewster is dismissive when she offers to help him - you have to be big and strong to do the things he does. When Zephie overhears Brewster being given his jobs for the day, she decides to do some of them for him. Then he'll see just how good she is at pulling freight!

A magazine photographer is coming to Chuggington to do a feature on steam trains. Olwin is determined to look her best for her picture and heads for the chugwash. Along the way, she encounters Wilson and Brewster tugging a car back and forth between them, arguing over who gets to deliver Ebo the elephant's special soap. Neither of them wants to do the other job - a quarry delivery.

When Irving leaves Koko in charge of the recycling yard, she's keen to show how responsible she is. In fact she's so excited, that she doesn't listen properly to his instructions. She ropes Wilson into helping her, and loves having an 'employee' to boss around. Because she hasn't listened, things go very wrong: machinery gets clogged with paper, the pallets get knocked over.

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.

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.