26 episodes · 21st September 2015
Thomas gets himself into trouble and blames a made up engine, by the name of Geoffrey. But when people and other engines around the island start asking to meet him, Sir Topham Hatt also wants to meet this so-called Geoffrey.
Toby accidentally runs out of coal at the scrapyards, leaving the engines to think he's going to be scrapped.
The Fat Controller is anxious as two grumpy inspectors have come to inspect the railway, starting with Thomas. To prevent an even worse report, Thomas helps return a lost pocket watch to the railway inspector.
After he sees the Fat Controller's grandchildren with chickenpox, Henry worries about catching the disease himself.
Thomas is sent to take a special crate to the Town Square from the docks, but Cranky accidentally drops it.
Kevin gets stuck out in the snow, and Victor goes out looking for him, despite his hatred of snow.
Henry becomes paranoid of meeting an abominable snowman after Spencer teases him about it.
Toad spots a stranded whale on the beach, but Oliver does not take him seriously.
Percy doesn't notice sheep jumping out of his cattle truck.
Salty's imagination runs away with him as he worries about going to the Mainland by sea.
Mavis has an accident at Anopha Quarry and is sent to the Dieselworks. Den is sent to take her place, while Dart has to stay at the Dieselworks. However, the two always work together and they fear to be without the other.
Thomas feels guilty about causing Hiro to have an accident. To make up for it, Thomas ventures into Hiro's old hideout to see if he can try to salvage some left behind parts.
Stephen is a slow engine, but one day, when the Sodor Suspension Bridge collapses, he has to stop Gordon from crossing the bridge before it's too late.
Thomas, Spencer, and Bertie argue over how many wheels are best.
Thomas and James compete with each other to see who can get their passengers and football teams to Dryaw first.
Emily idolises Caitlin when she sees how fast Caitlin can go.
A new diesel boxcab named Philip arrives. Loving to race, he thinks he's racing Gordon when in actuality Gordon never took part.
James is determined to prove himself stronger than Philip.
Diesel starts causing trouble at Christmas time and he gets visited by the Ghost of Christmas Past.
Diesel now meets up with two other ghostly engines. The Ghost of Christmas Present and the Ghost of Christmas Future, and he later finds the Fat Controller still at Knapford during the Earl's Christmas party at Ulfstead Castle.
A mother and her noisy baby want to have a ride on Thomas' train, but the baby keeps crying which irritates Thomas and the passengers.
Rocky ends up derailing and the Search and Rescue Team have to work together to put him back on the rails again.
Thomas discovers Bertie's been rerouted to behind the other side of the mountain, making Thomas curious as to what's there.
Bill and Ben say that Timothy is no help at all.
Percy overhears some workmen talking and thinks the Fat Controller is leaving Sodor. Also known as "Goodbye Sir Topham Hatt".
Diesel is jealous of Percy's job to collect the Mayor of Sodor, so he directs Percy to an old disused quarry while he takes him himself.
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