Bulgy's wish for the passengers to use the roads instead of the railway comes true when he accidentally contaminates the water in a railway water-tower.

The engines worry about Rebecca's first encounter with the Troublesome Trucks, recalling many of their own mishaps, but Rebecca proves she can handle them in her own way.

Toby fills in for Stephen at Ulfstead Castle and stops a pair of thieves from stealing King Godred's crown.

When Rajiv loses his crown, he refuses to do any work. That evening, Rajiv learns that he can be a really useful engine with or without his regal ornament.

Gordon becomes worried when he gets a serious case of the giggles.

Thomas finds a way to take part in the Brazilian carnival music.

Thomas meets another big blue engine in Brazil that reminds him of Gordon.

Thomas causes confusion and delay by not seeking help when he makes a mistake.

When Diesel gets cross, he decides to get the other diesels into trouble by sending Rebecca to do their jobs, badly, but Diesel's trick is found out at the end.

Raul wants to beat Thomas in a game, but his competitive nature soon gets him into trouble.

The steam engines must work overtime to unload cargo from the docks when a series of accidents puts Porter and all of the diesel engines out of action.

Thomas discovers that he doesn't know as much as he thinks he does while working in Italy. He also learns the intriguing tale of the legendary Lost Engine and runs into trouble on an old, abandoned line.

When Jack and the Sodor Construction crew arrive in Italy, Thomas is jealous of their amazing discoveries. Then, an accident leads Thomas to making the biggest discovery of all.

Shane is having too much fun to stop and refuel; that is, until he runs out of coal and is stranded in Australia's hot, red desert.

Thomas misses his best friend Percy while working in China.

Brenda learns it's important to work as a team and not just care about her own jobs.

A new tunnel-boring machine called Darcy arrives to join the Sodor Construction Company, but has a hard time fitting in at first.

When Thomas loses his voice trying to sing opera like his Italian friends, he must find a new way to pass on a very important message.