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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.

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.