Diesel 10 is a diesel engine that tells the other diesels what to do.
He has a crane that he named "Pinchy".
Diesel 10 first appeared in Thomas and the magic railroad.
- Series 3 - Escape to the Little Western
- Series 17 - The Missing Christmas Decorations
- Series 22 - What Rebecca Does (fantasy; Pinchy only)
- Thomas and the Magic Railroad
- Calling All Engines!
- The Great Discovery (cameo)
- Misty Island Rescue
- Day of the Diesels
- Neil Crone (Thomas and the Magic Railroad)
- Matt Wilkinson (UK/US; Misty Island Rescue onwards)
- Ginzō Matsuo (Japan; Thomas and the Magic Railroad only)
- Kiyoyuki Yanada (Japan; Calling All Engines only)
- Takaya Kuroda (Japan; Misty Island Rescue only)
- Ryōta Yamasato (Japan; Day of the Diesels only)
- Yohei Nishina (Japan; seventeenth series onwards)
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