School's in session and there are important lessons to be learned on the Island of Sodor. Diesel gets a hero's welcome when he makes a Really Useful delivery to the schoolhouse. Percy gets a lesson in responsibility after he runs into trouble trying to be like the bigger engines! Henry gets trained in how to handle health and safety emergencies, while Hiro teaches Thomas about his happy homeland. Join the Steam Team for a bright journey to the Head...

Even when it's wet outside you can still have plenty of fun, especially when you share your adventures with Thomas and his friends! Grab your galoshes and join the team as they prepare for rainy day visits and soapy spills, and then get unstuck from a snowy situation in this collection of stories from the Island of Sodor.

When trouble strikes at the Blue Mountain Quarry, Thomas is sent to help his Narrow Gauge engine friends. While shunting and hauling, he catches a glimpse of a small engine trying to hide, yet no one will provide any clues to the engine's identity. Thomas is determined to get to the bottom of the mystery, but discovering the truth is harder than he imagined! Will Thomas be able to save his new friend? Or will the mysterious engine be sent away from...

Determined to prove his importance on Sodor, Thomas takes James' trucks and sets off on a big adventure to the Mainland. On the way, he makes friends with the cheerful and helpful 'Experimental Engines' but, after a wrong turn, finds himself lost in the steelworks. There, Thomas encounters two mysterious engines who instantly make him feel welcome but who aren't what they first seem.