Ol' Wheezy has stopped working. The Logging Locos don't know what to do, which makes Thomas want to help them. First he goes to the diesel works and asks Dart to come with him to help. After Dart's attempt, he gives up and returns to the works. Thomas then asks Den to come and help, but Den says he wouldn't leave without Dart. But Thomas ignores that fact. Back at Misty Island, Dart's attempt also fails. In the end Thomas realises that Den and Dart can manage things when working together.

Dowager Hatt is having a party for some important visitors, and Thomas is chosen to pull the express, which is harder than he expected.

Percy fears a monster may be near when the fog rolls in while he's waiting at Brendam Docks; Thomas is so intent on appearing in every shot of a "Great Railways of Sodor" book that he's unaware when Percy and James become derailed.

Charlie hides behind a snowman and as Henry passes Charlie pretends to be the former to help Henry appreciate snow.

A photographer wants to take some pictures of the engines for a book, and Thomas wants to be in as many photos as he can, but he ends up causing many of his friends to have accidents, and suddenly the photographer's camera drops onto the tracks and gets smashed. Thomas races to the docks to get the spare camera, and helps his friends at the same time. Eventually, everything is put right again.

Thomas helps Whiff pull a train to the waste dump, but ends up causing an accident when he tries to get the job done faster.

Thomas tries to help keep the crows off Farmer McColl's seeds.

Gordon's bufferbeam is broken and he is given a diesel's bufferbeam, much to his dismay.

Percy tries to save an old calliope from the Smelter's Yard.

Thomas helps a famous composer look for inspiration for his new music.

Edward tries to find Salty a Christmas present after Salty says he has no time for the holidays.

Thomas tries to get Gordon to have fun on Sodor Surprise Day, but ruins the fireworks Gordon was supposed to collect instead.

Sir Topham Hatt tells Emily that she can pull the Winter Special if she finds his top hat.

James gets to take Farmer McCole's sheep to a festival, and finds himself needing to make the decision of going onto muddy tracks or risk the chance on old or alternative tracks. When he realises he is running late, he takes the chance and takes the easiest way through muddy tracks. The photographer takes the photo at the festival, stating that "that's a really useful engine" because James worked hard, even though he got muddy.

Whiff wishes that he was as grand as Spencer, and tries to implement the advice that Spencer gave him.

Spencer shows Stafford, the new electric shunting engine, around Sodor, but ignores a warning that Stafford's batteries could run out.

The Thin Controller leaves Peter Sam in charge of the Narrow Gauge Railway, telling him not to bother Victor during his visit.

Thomas and Winston attempt to restore an open-top carriage for Sir Topham Hatt's birthday.

Toby takes Rheneas to Misty Island to find the perfect Christmas tree.