Diesel's Christmas Journey is an upcoming 22 minute special which will air on Christmas Eve 2018.
Diesel has a Christmas journey on Sodor and he will be happy to have Christmas with all of the engines.
- Sir Topham Hatt
- Sir Robert Norramby
- Gordon (cameo)
- James (cameo)
- Percy (cameo)
- Stephen (cameo)
- Porter (cameo)
- Glynn (cameo)
- Norman (cameo)
- Den (cameo)
- Dart (cameo)
- Millie (cameo)
- Carly (cameo)
- Big Mickey (cameo)
- Stock footage from No More Mr. Nice Engine and Diesel's Ghostly Christmas are used.
- This special marks the first of a couple of things:
- The first special to feature Diesel as a main character.
- Scruff's first speaking role since The Great Race.
- Harvey, Whiff, Scruff, Stephen, Glynn and Millie's first appearances in a special since Journey Beyond Sodor.
- Harvey's first speaking role in a special since The Great Discovery
- The first special to have 22 minutes and the first special to be shorter than 60 minutes.
- The first special in where Gordon, James and Percy do not speak.
- The first special since Thomas and the Magic Railroad in where Edward does not appear.
- The first special since The Adventure Begins in where Toby and Rosie do not appear.
- The first special where Henry, Donald, Douglas, Oliver and Philip do not appear.
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