Mavis is a young diesel engine who is starting work at the quarry. Unfortunately her way of shunting is a lot different from Toby's and he gets annoyed. A bit of false encouragement from Diesel gets Mavis into trouble.
| Creator | Britt Allcroft |
|---|---|
| Actor | John Hasler, Joseph May |
| Country | Canada, United Kingdom, United States of America |
| Production | Nitrogen Studios Canada |