Skiff and the Fat Controller go on a wild adventure around Arlesburgh Harbour in search of a mermaid.

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.

It's Christmas Eve and a lot of passengers are coming home to Sodor for the holidays. Connor can't carry all the passengers who are trying to get on his train.

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.

Stephen becomes jealous of all the attention received by Glynn at the castle.

One winter's evening, Henry is excited to be given the chance to pull the fish train that the men call, "The Flying Kipper". Unfortunately, snow and ice result in an accident. The Fat Controller decides to send Henry off to the Works at Crewe, where Henry will unknowingly be given more than just a repair job...

Duncan, the grumpiest engine on the narrow gauge railway, gets a taste of his own medicine when he receives a very grumpy passenger.

Daisy manipulates Ryan to get him to do her extra work, as well as his own.

Daisy boasts about transporting an entertainers group.

Percy tells Thomas and Toby a story about a ghost train. Thomas doesn't believe it and says Percy is a "silly little engine". Percy's Driver later tells him it wasn't true, it was on television. Later that night, Percy is on his way back from the Harbour when he crashes into a lime cart trapped on a crossing. Now white as a sheet, and with help from Toby, Percy heads off to find and scare Thomas...

Douglas attempts to rescue a frightened engine called Oliver, and his brakevan, Toad, from the place all steam engines fear to go - THE OTHER RAILWAY!

Toby has been sent to check the dam on the river. It has been raining heavily recently and there are worries the dam won't hold. After inspection, the dam starts to break up! Will Toby escape its wrath in time?

One evening, Henry has to take some trucks to the other end of the line, and everything is fine until he has to travel through a spooky section before a viaduct, of which Henry becomes convinced is haunted after experiencing quite some oddities...

Thomas and Rusty are both trapped at a tunnel and can't go any further until the the heavy snow is cleared away that has fallen. So to pass the time, Rusty tells Thomas the story of how Skarloey was traveling through a ravine when an avalanche came down on him.

Everyone is happy at Christmas time except for Duncan, the Scottish narrow gauge engine, who seems to be grumbling even more than usual.

Diesel is always bumping into people and laughing, but when he does it to Daisy, her springs need fixing. In the Dieselworks, thinking that she is asleep, Diesel explains why he did it - it's his way of trying to make friends!

Some boys fiddle with James's controls and he trundles off down the line by himself. It is up to Edward to catch up with James and allow James's fireman to jump aboard the runaway engine to stop him.

Duck has been sent to work with Edward for a while, and tells Edward that the Fat Controller and the other engines all hate him. Edward says they don't, and asks Duck if he would like to help him work. Duck helps Edward pull a heavy goods train up Gordon's Hill, but the trucks break away and speed down the line. Duck manages to control them but a barber's shop is up ahead...

Henry, Gordon and James are teasing poor Edward about being too old and "how he should be preserved before it's too late." Duck and Boco tell them to "Shut up!" as "Edward's better than any of you!"; and during a serious breakdown on an important journey, Edward proves his worth once and for all.

Stepney's visit is coming to an end and Thomas, Percy and the rest are very sorry that he is leaving. But they have other things to worry about when a big-headed Diesel comes to help in the yard and scoffs that steam engines are old fashioned. However, when a bowler hat causes delay, Duck and Stepney show him just what a steam engine can really do!

Stepney is bored, so the Fat Controller agrees to allow him to help out Mavis and Toby at the quarry for the day. He works well, but on the way home gets lost and ends up in the scrapyard, where diesels 'Arry and Bert take him for scrap!

Toad the brake van is feeling glum as he is always seeing things sliding away from him and would like to go forward for a change. Oliver wants to help but doesn't know how. That afternoon, Oliver is pulling some trucks up Gordon's Hill, with Toad as his brake van. The trucks break away after a coupling snaps and now Toad is at the front of the train going forwards. Unfortunately he is on the Main Line with various possible disasters up ahead!

Gordon says that pulling trucks "wouldn't be dignified" and Salty teases him about this and acting "too big for his buffers". Gordon becomes cross and wants to show Salty a thing or two but ends up in a rather "undignified" situation instead!

The Duke and Duchess of Boxford pay a visit to the engines, and bring with them Spencer, their own private engine. He is sleek, shiny, fast and full of pride. Gordon is jealous and feels that he is not the fastest engine anymore. However, disaster strikes when Spencer runs out of water! It is up to Gordon to save him and redeem himself of his stolen title.

Henry and Hiro take on some of the bad coal and start puffing black smoke.