Sidney is a very forgetful diesel engine who decides to make up a song to help him remember a very important job.

Philip tries to befriend Toby the Tram Engine, thinking he is a diesel boxcab like himself. Unfortunately, young Philip and old Toby don't seem to like the same things.

Henry is given the job of pulling the express. Meanwhile, Gordon is reassigned to Henry's goods trains and he doesn't like it one bit.

Rough and tough Diesel shows that he's really a big softie when it comes to fluffy little ducklings.

Bradford is a very strict brakevan who abides by all the railway rules and regulations. As a result, the engines of Sodor find him very difficult to work with.

Daisy upsets Annie and Clarabel and the two coaches learn that two wrongs do not make a right.

When Glynn comes to work at Ulfstead Castle, Stephen is jealous and challenges the old Coffeepot Engine to a race.

Donald and Douglas have a falling out and Douglas gets left stranded in the snow without his tender. When he realises what has happened, Donald sets off to rescue his brother.

Old rivals Percy and Harold the Helicopter have to work together to get the children's letters to Santa to the North Pole on time.

Duck's whistle is making funny noises and Mike and the other engines make fun of Duck.

James is tasked with taking the Mayor and Sir Topham Hatt to a ball.

Marion discovers what she thinks is a talking Christmas tree, but it turns out to be Glynn the Coffeepot Engine who is restored and sent to work at Ulfstead Castle in time for the Earl's Christmas Party.

Samson causes confusion and delay by hauling more trucks than he can handle.

To save time travelling to the dump, Max and Monty tip their loads over the railway line and cause a great deal of confusion and delay for Thomas.

When Connor breaks a coupling rod, he is so nervous about history repeating itself that he decides not to go fast anymore which causes a lot of complaints from his passengers. Will Connor ever be the same engine again?

Daisy and Ryan are given extra duties, but Daisy is not happy about it and tricks Ryan into doing all her extra jobs.

It's a very hot day on Sodor and the tracks on Thomas' Branch Line are buckling under the heat. Meanwhile, Dowager Hatt gets the Fat Controller a ridiculous new hat to wear to keep him cool.

After some complaints, the Fat Controller takes away boastful James' coaches until he can improve his attitude. With some help from his friends, James is able to change his ways.

Skiff the Railboat gets blown away during a fierce storm and still manages to save Duck, Oliver and Toad from a nasty accident involving a fallen tree.

Daisy lets her imagination run away with her when the Fat Controller gives her a very special job.

Henry is accidentally painted with luminous paint and his friends think he is a ghost engine.

Judy and Jerome, the breakdown train, are bored of sitting in the yard so try some different surroundings. Unfortunately, when Daisy derails, no-one knows where the breakdown train is.

Hugo is convinced that he belongs in the sky when he spots an airship that looks just like him.

Thomas, Percy and Toby think that there's a troll under the bridge by the watermill.

Skiff is so desperate to find a mermaid, that he sails off with the Fat Controller and they drift out to sea.

Rex is tasked with taking wool trains.

Two men (The Rev. W. Awdry and The Teddy Boston), are visiting Sodor. Bert at first likes the visitors until the splash mud on him with their car.