Really Useful Indeed

Plot
After being told by Diesel that he's not a Really Useful Engine and that he'll be back to having accidents, Percy has an accident with some Trucks from the Quarry and looses confidence. But when a Canal Boat gets stuck on dry land, can Percy save the day?

Characters

 * Percy
 * Diesel
 * James
 * Troublesome Trucks
 * Toby (mentioned;does not talk)
 * Bear (mentioned;does not talk)
 * Edward (cameo)
 * Henry (cameo)
 * Duck (cameo)