Thomas & Friends: Sodor's Legend of the Lost Treasure is a 2015 British computer-animated fantasy adventure comedy film and the ninth feature-length special of the British television series, Thomas & Friends. The film is produced by HIT Entertainment and animated by Arc Productions.

Plot

Thomas the Tank Engine takes an opportunity to beat Bertie the Bus in a race on his branch line When Bertie gets stuck behind an excavator on the road. Bertie complains about all of the machines working on the new branch line, which concerns Thomas' coaches Annie and Clarabel. The next morning, Thomas gets too cheeky and causes an accident at Knapford Junction. Sir Topham Hatt sends Thomas to the construction yard to work on the new branch line, while the new engine, Ryan, is given Thomas' job for the time being.