G / English / Animation / 1 Hour 10 Minutes
Thomas takes James` trucks and goes on a big adventure to the Mainland. On his journey, Thomas stumbles upon the cheerful Experimental Engines. After a wrong turn, Thomas finds himself lost in the steelworks, where he then meets two mysterious engines that made him feel welcomed instantly. After Thomas fails to return, James sets off to the Mainland but runs into trouble on his way, and it is up to Thomas and the Experimental Engines to save James and bring him back to Sodor.
| Director: David Stoten |
| Cast: Mark Moraghan, Darren Boyd |
| Release Date: 26, August 2017 |