Which Way? is a magazine story.
Thomas takes the Vicar's Sunday school on an outing to a stately home, where the children have fun in the maze. Thomas tells the other engines that night about the maze and boasts that he would never get lost in one. The following day, Thomas is diverted onto an old overgrown siding because of a landslide. Thomas decides to explore and gets lost amongst all the winding, overgrown tracks. Duck, Harold and Percy all join the search to find him.