Cast[]
- Percy as Henry (Percy and Henry are both green and they both end with y)
- Hiro as Flynn
- Gordon as Thomas (Gordon and Thomas are both blue)
- BoCo as Diesel
- Duncan as Spencer
- Billy as Scruff
- James as Trevor
- Thomas as Victor
- Bill as Bill
- Ben as Ben
- Stepney as Kevin (Stepney and Kevin are both yellow)
- Diesel 10 as Alfred the Loaned B12
- Bash as Splatter
- Dash as Dodge
- Ferdinand as Bear (from RWS)
- Elizabeth as Judge Judy the Diesel
- Molly as Lady
- Oliver as Bertie
- Rosie as Molly