'Arry & Bert, the naughty diesels, take advantage of the fact that it's Halloween and when Thomas and Emily are sent to do important work at the Smelter, the two diesels decide to give the steamers a fright or two!
| Creator | Britt Allcroft |
|---|---|
| Actor | John Hasler, Joseph May |
| Country | Canada, United Kingdom, United States of America |
| Production | Nitrogen Studios Canada |