The adventures of Thomas the Tank Engine and his friends on the island of Sodor. Thomas is often in trouble and finds it difficult to be a useful engine.
Down at the docks Cranky the crane is snowed under, so the Fat Controller asks Kevin, a very enthusiastic young crane from the steam works, to help out.
The Fat Controller decides it's time for Scruff to be repainted. But Scruff hates being washed, let alone repainted! How will he cope with a makeover?
While keeping an eye on some track repairs, the Fat Controller forgets to put Winston's hand brake on and he rolls off on his own causing mayhem!
Paxton tells Gordon that he should be careful after he suffers a knock to his boiler, which results in a leak, but Gordon does not listen and ends up at a stop.
Henry and Hiro begin to puff some black smoke after they take bad coal, and while Henry waits by the shed for new coal, Hiro decides to deliver the loads.
Stafford, the electric engine, asks Thomas to teach him to make a sound like a proper engine. But when is it useful to be quiet?
CGI animation. Henry and Hiro take on some of the bad coal and start puffing black smoke. Will Hiro be able to deliver their loads when Henry goes back to the shed?
Up at the Blue Mountain Quarry Luke finds a scared young deer, so he tries to get the other engines to work quietly. But that is not an easy thing to do.
When Luke is sent to Ulfstead Castle to deliver stone, he meets Millie, the Earl's private narrow gauge engine. They decide to switch jobs for the day.
Charlie learns that there are times to be serious and not tell a joke, if he wants people to help when the situation calls for it, like when an elephant is on the tracks.
Thomas accidentally backs into Toby at the water tower and gets his firebox wet, meaning that poor Thomas must wait for his firebox to dry out.
Can Duck and Thomas learn to work together when Harold the helicopter breaks down and needs taking to the Sodor Search and Rescue centre for repairs?
At Ulfstead Castle, as Stephen reassures Percy that there is no such thing as ghosts, James tries to scare them! But he ends up scaring himself.
A couple of mishaps involving a torn sack of mail and some cargo on the line make Percy feel unlucky. Stephen lends Percy a lucky charm to get him back on the right track.
When a new engine called Connor arrives on Sodor, Bill and Ben play a trick on him that nearly leads to him having an accident.
When inspectors question whether the Fat Controller needs two fire engines, it causes concern for Sodor's fire fighting team, Flynn and Belle.
It is a snowy day, but Thomas does not want to wear his snow plough so he hides it and Emily is sent out to clear the tracks instead.
Thomas is sent to bring a real sleigh for the Fat Controller to ride in when he plays Santa at the Ulfstead Castle Christmas fair.
No one knows who is taking the Steamies' Christmas decorations from the Tidmouth sheds, until Percy discovers Diesel 10 stealing them.
When the turntable is freezes and only one berth is accessible Gordon thinks he should have it, but Thomas insists that they need to save it for Percy who is out on the mail run.