Useful Railway

"Oh, crumbs! That's torn it!"

- Willie after his trailer overturned.

Useful Railway is the twentith episode (nineteenth in Australia) of the twentieth season.

Plot
Mike is annoyed that the miniature railway is not being taken seriously, being referred to by passengers as a "toy railway," and becomes even angrier when his track is blocked by some sheep. That night, while he is complaining to Rex and Bert in the shed, Rex informs Mike that the sheep's wool is useful. The Small Controller arrives and explains that the farmers have asked the railway to take their sheep's wool to market and that, if they do it well, it will show everyone that they are a useful railway. He chooses Rex to take the first train, as Rex has been boasting that it would be easy for him.

The next morning, Rex takes some empty trucks and picks up the wool from each of the farms along the line. The wool has been made into bales that can be stacked into the trucks.

Rex insists that the job is easy, but he and his driver do not realize that the last load belongs to a farmer named Willie. Willie often dawdles and is usually late as a result. Because he is in a hurry, he has not tied his wool bales down to his tractor's trailer and does not have time to stop and do so. As he turns a corner, he loses control and the bales of wool fall down a hill and onto the tracks. When Willie hears Rex coming, he runs onto an overhead bridge and tries to slow him down, but Rex does not brake until after he has passed under the bridge. He hits the wool, derailing him and several of his trucks. The Small Controller arrives to see what has happened. Willie apologizes to Rex and the Small Controller for his carelessness and helps reload Rex's trucks.

Bert arrives and collects Rex's train, teasing Rex for claiming that pulling the wool train would be easy. Rex remains derailed on the bank for several days, being teased by Mike as he passes. Eventually, Mike and Bert come to take Rex home.

When they arrive at Arlesburgh, the Small Controller expresses how proud of the engines he is: Rex for managing to stop and preventing a serious accident, and Mike and Bert for handling on their own in Rex's absence. He tells the three engines that the passengers all admire how they manage and have promised the railway plenty more business.

Characters
Some passengers also speak. They are voiced by Keith Wickham and Teresa Gallagher.
 * Thomas
 * Bert
 * Rex
 * Mike
 * Fergus Duncan
 * The Thin Clergyman
 * Willie
 * Rex's Driver
 * The Ginger-haired Boy
 * The Welsh Bird Watcher
 * Annie and Clarabel (cameo)
 * The Lady with the Big Hat (cameo)
 * Albert's Wife (cameo)

Locations

 * Arlesburgh West
 * Arlesdale
 * Arlesburgh West Shed
 * Arlesdale Green

Trivia

 * This episode is based on the story of the same name from the Railway Series book, Small Railway Engines.
 * Multiple instrumental variations of Never Overlook A Little Engine are heard. The phrase is also spoken by Mike towards the end of the episode.
 * This was one of five episodes that was incomplete at the time Arc Productions went bankrupt, and was finished off by Jam Filled Toronto after Jam Filled Entertainment bought the aforementioned studio.
 * The part where Rex crashed into the whool in slow motion, has became a YouTube meme and has been parody with various songs.

Goofs

 * The steel ballast ramp at Arlesburgh West is silver instead of green. Parts of it also alternate between green and silver between some scenes.
 * When Thomas says "Oh, hello, Rex!" and Rex whistles and says "Hello, Thomas!" Rex looks in the wrong direction. In the same shot, the top of the ballast ramp is missing.
 * When Bert is turning on the turntable, Rex's wheels continue to move after he stops.
 * When Mike and Bert rescue Rex, Mike has Rex's whistle sound.
 * When Bert tells Rex the accident wasn't his fault, his front chain is missing.