Springtime for Diesel

Springtime for Diesel is an episode from the twenty-first season.

Characters

 * Thomas
 * Diesel
 * Daisy
 * Den
 * Dart
 * Sir Topham Hatt
 * Percy (cameo​​)
 * Toby (cameo)
 * Duck (cameo)
 * Philip (cameo)
 * Ryan (cameo)
 * Class 40 (cameo)
 * Diesel 10 (cameo)
 * Judy and Jerome (cameo)