The Best Diesel Day Ever

The Best Diesel Day Ever is an upcoming episode.

Plot
Den and Dart decide to throw a day out in Vicarstown. Philip, the Diesel Boxcab, arrives with D261. Philip is very chatty and enthusiastic. He tries to prove to Diesel that he can go really fast and has a race with D261. Diesel questions his purpose after realizing that he can't maintain his work before he made up with Philip by getting him to ask Den and Dart to throw a party at the Dieselworks.

Characters

 * Thomas
 * Oliver
 * Diesel
 * BoCo
 * Daisy
 * Mavis
 * Class 40
 * 'Arry and Bert
 * Diesel 10
 * Splatter and Dodge
 * Salty
 * Dennis
 * Paxton
 * Norman
 * Sidney
 * Den
 * Dart
 * Philip
 * Toad
 * Sir Topham Hatt
 * Annie and Clarabel (end segment)
 * Gordon (stock footage)
 * Spencer (stock footage)
 * Yong Bao (stock footage cameo)
 * Hong-Mei (stock footage cameo)
 * An-An and Yin-Long (stock footage cameo

Trivia

 * At the end of the episode, Thomas mentions the events from the twenty-first and the twenty second season episodes, Confused Coaches and Thomas and the Dragon, stock footage from both episodes are also used.