Thomas & Friends, Marvellous Machinery

When Thomas finds out that the Earl's Technology Fair will bring new inventions to Sodor, he sets out to prove that steam engines are the best inventions ever.

When a pair of crooks steal the plans for a great new invention, there is a high-speed chase to try and get them back.

Sonny is trying to prove himself to be a useful engine so that he can stay working on Sodor, but nobody seems to trust him... nobody apart from Diesel, that is! But can Diesel be trusted?

When Kenji hears that he must travel home to Japan alone, he gets scared and tries to hide. So, Thomas sets out to find him.