Thomas is in China taking passenger trains with An An and Lin Yong, where he gets into trouble while racing with Hong-Mei, another blue tank engine, and the number 1 engine in China.

With all the changes being made to the railway, such as Edward and now Henry leaving Tidmouth Sheds and Nia staying in Edward's place, Gordon is feeling a little blue, so Nia has to help him get used to it.

A new tender engine named Rebecca comes to work on the North Western Railway, but gets clumsy and blocks the Flying Scotsman's platform at Vicarstown early, makes her passengers late by leaving the stations early, and blocks the engines down at Brendam Docks.

While working on the Indian Railway, Ashima tells Thomas that elephants used to work in the yards shunting trucks. When Thomas derails in a muddy pond, he is very surprised when an elephant comes to his rescue.

After admiring Belle's water cannons for putting out fires, Marion's steam shovel for digging holes and playing games, and Harvey's crane hook for lifting crates and putting Bill, Ben, and the Troublesome Trucks back on the tracks, Rebecca is worried that, unlike the other engines, there is nothing special about her.

When an action movie is filmed on the Indian railway, Thomas is desperate to be involved.

Yong Bao informs Thomas about Pandas as the national animal in China, so he looks hard for one in the bamboo forests while taking the film crew, An An and Lin Yong to the Nature Reserve.

Thomas is pulling a truckload of coconuts to the Indian Railway Station for Charubala and her friends when he encounters some cheeky monkeys at the Monkey palace, despite Rajiv's warnings.

After a crash at the back of Tidmouth Sheds for showing off, James is waiting at the Steamworks to be repaired. He hears that there might not be enough red paint to repaint him and gets worried he will be repainted a different colour. He dreams he will be blue like Thomas, Edward, and Gordon, green like Henry and Percy, and silver like Spencer, and gets into a crash while showing off in every dream.

Shane shows Thomas the Outbacks of Australia, leading Thomas to take his coaches, Aubrey and Aiden, and some passengers on the Outback tour, only to take a wrong turn and get stuck on a high bridge.

When a storm destroys a classroom at Harwick School, Duck tries to find a coach to take the children in, but fails when everyone seems unable to spare a coach, with Toby using Hannah while Henrietta is away, Edward using the Slip Coaches, Emily using hers, and Gordon just saying no. When he finds a coach named Dexter, Duck only gets bad news that reveals that Dexter has some bad wheels. He then chooses to take Reg's advice on recycling to take Jerome and Judy to help out Dexter and make him useful again.

When Ashima tells Thomas that tourists come to India to try to see tigers in Noor Jehan's tiger safari trains, he wants to see the tigers too. After seeing a tiger, Thomas learns from Shankar that Tiger Hunters want to kidnap the tigers, leading the two to save the tigers from some Tiger Hunters in Rajiv's passenger train.

Thomas' friend Merlin comes to Sodor from the Mainland for the first time, and Percy wants to see him.

James starts to bully Philip and not say sorry to him. But when Philip takes the Troublesome Trucks of sardines over the fenland track, James blocks his way and causes Thomas, Paxton, and Rebecca to stop behind them, Philip learns that sometimes even the smallest engine's actions can make them the bigger engine.

Thomas thinks he has been given very silly cargo until Hong-Mei explains that it is a very important water wheel, made from bamboo, but Thomas loses it while taking a shortcut and tries to get it back.

Samson is terrified of fireworks, as Thomas finds out, and when Samson mistakes the sound of Cyril the Fogman's warning detonator for fireworks, he is so frightened that he races off with Bradford into the fog and gets lost, only for him to follow Sir Robert Norramby's fireworks display at Ulfsted Castle during the night.

Thomas tries to save one of the Troublesome Trucks of China, named Lei, but fails to do so. Yong Bao teaches Thomas all about tai chi, and Thomas soon uses it to rescue Lei, who is racing down the tracks again.

It's Christmas and the boiler at the Animal Park breaks down, so it's up to Thomas and the Steam Team to find a way to keep the animals warm.

Thomas wants to be just like Isla, a Flying Doctor's plane, who transports Dr. Claire to remote places where it is hard for patients to get to hospitals or doctors for treatment, but fails to do so. When a cyclone come in, Thomas is determined to save the day.

Thomas is in Australia for Christmas, and is disappointed that it is different from Sodor due to no snow. But in the meantime, he must help a little girl named Madeleine retrieve her toy kangaroo from a real one.

Thomas is terrified when he is given the honor from Yong Bao of bringing a dragon to the Chinese New Year celebrations, thinking it would be a real fire breathing dragon.

During Valentine's Day, Thomas and Rosie try to avoid each other after Diesel, Bill and Ben tease them for being "special friends", but they must come through their fears when Sir Topham Hatt asks them both to prepare his Valentine's Day surprise for Lady Hatt at Vicarstown.

Sidney is shunting a flatbed of engine parts, but he cannot remember what he is supposed to be doing with them since Diesel jolted his memory. Paxton thinks this sounds like a kind of mystery that can only be solved by a Special Agent.

Thomas offers a lift to a ranger named Ranger Jill while working in the Australian Rain Forest. Thomas is excited to learn from her about all the animals that live there, but he is too loud and impatient to be very useful.

Nia is a really clever engine and knows about all sorts of things, but when the Fat Controller asks her to take Annie and Clarabel and pick up passengers from Knapford Station to Thomas' Branch line, Nia has great trouble reading numbers so Annie and Clarabel teach her.

Bill and Ben's latest game consists of hiding trucks and making other engines look for them. But when the twins hide a van full of Sir Robert Norramby's Christmas supplies for Edward to collect, they try to return it, but have to travel all over Sodor to look for it.

Bulgy thinks that all passengers should travel by bus and not rail until he learns that having so many passengers is not easy for the buses on their own.

Rajiv learns that he can be really useful with or without his crown.

Rebecca defies expectations from Thomas, Percy & James when she works with the Troublesome Trucks and has a very amusing day.

Thomas meets another big blue engine that reminds him of Gordon on his first day in Brazil.

Some rude passengers make fun of Toby while working at Ulfstead Castle but he soon proves some them wrong when he saves the crown.

Thomas finds a way to take part in the Brazilian carnival music.

Gordon becomes worried when he gets a serious case of the giggles.

Thomas causes confusion and delay by not seeking help when he makes mistakes on the Indian Railway.

Diesel plays a trick on Rebecca to try to get the other diesels in trouble for a change.

Raul wants to beat Thomas in a game, but his competitive nature soon gets him into trouble.

The Steam Team must work overtime to unload cargo from the docks when a series of accidents put all of the diesel engines out of action and Percy is stuck working on his own.

Percy causes confusion and delay by panicking when he thinks Thomas had an accident.

Thomas is keen to prove to his new friend Gina that he is an expert in all things Italian, until he gets lost down an old mine on his first day in Italy.

Thomas wants to impress his friends by finding an amazing discovery. It is not long before his wish is granted, although not in the way he had expected.

Thomas is selected to take the Fat Controller to London for a Royal Appointment, but with no knowledge of how to get there, their journey is filled with confusion and delay.

Shane has too much fun to stop and refuel until he runs out of coal and gets stranded on the Australian Railway.

Emily takes the Sodor Rangers camping but gets derailed, but also spends the night with Nia during her accident.

Thomas misses Percy while working on the Chinese Railway.

Brenda learns that it is important to work as a team and not just care about her own jobs.

Darcy makes some mistakes on her first day, but she soon makes up for it when everyone sees what she can really do.

Lorenzo gets lost when he leaves Beppe behind to take Dame Bella Canto to a concert alone.

Monty's antics on a construction site get him into trouble.

Thomas attempts to sing opera and loses his voice, when he must pass on a message.

When Diesel hides from the other engines, his plans backfire and he gets a surprise.

Emily worries that she does not have a best friend, but when the other engines help her out of a tricky situation, she realizes she has been surrounded by best friends all along.

Thomas discovers a missing dog on the railway and tries to find it a new home.

When a Railway Show for little engines comes to Sodor, an overly excited Percy finally sees his chance to shine.

In Brazil, Thomas meets two wood-burning engines who have never traveled beyond their eucalyptus railway. Thomas agrees to swap jobs with them for the day, but this causes more trouble than he expects.

When a pretend emergency turns into a real emergency, Emily comes to the rescue.

Thomas pushes Shankar into entering the Fancy Costume Contest, even though Shankar does not want the spotlight on him.

Nia is bringing an elephant to the Sodor Animal Park, but the elephant does not like steam engines.

When Rebecca tells James he could be a comic-book super-engine, he takes her seriously, and Rail Rocket is born.

When Thomas has a run of bad luck, he tries everything to get back on track, even if it means following Lorenzo's strange, superstitious advice.

Thomas helps his friend Ace overcome his fear of animals so that he can compete in the Super Stunt Rally.

When Thomas finds out that the Earl's Technology Fair will bring new inventions to Sodor, he sets out to prove that steam engines are the best inventions ever.

When a pair of crooks steal the plans for a great new invention, there is a high-speed chase to try and get them back.

Nia uses what she learns about lighthouses to suggest covering a big wheel in Christmas lights so that Harold can see where he is going in a storm.

Cleo is shocked to learn snow does not last forever and tries to stop it from melting.

Sonny is trying to prove himself to be a useful engine so that he can stay working on Sodor, but Diesel seems to be the only engine who can trust him.

Thomas helps Ruth fix up an old windmill into her new, energy-efficient workshop.

When the Rickety Old Bridge collapses, trapping Toby and Henrietta on the other side of the ravine, Inventor Ruth is asked to build a new one.

Yong Bao tells Thomas the story of how he came to have a magnificent tiger emblem on his tender.

Gordon and Rebecca do the same work, but they go about it differently. When Rebecca tries to be more like Gordon, things do not go well for the big blue engine.

When Kenji hears that he must travel home to Japan alone, he gets scared and tries to hide, so Thomas sets out to find him.

When Ruth's new car, Cleo, takes to the rails to race Thomas, she soon discovers why she is designed to stick to the roads.

Thomas is asked to help at the animal park for the day and realises there is more to the job than he first thought.