Diesel 10/Douglas

Cast

 * Diesel 10 as Douglas
 * Old Stuck-Up (from RWS) as Harold
 * Diesel as Byron
 * Spamcan (from RWS) as Jeremy
 * Toby as Tiger Moth (Toby and Tiger Moth's names both start with T)
 * George as Bluebell (from RWS) (George and Bluebell are both green)
 * James as Stepney
 * BoCo as Neville
 * Splatter as Oliver
 * Dodge as Thomas
 * Derek as Donald
 * Henry as Spamcan (from RWS)
 * Max as Jack
 * Monty as Alfie
 * Duck as Kelly
 * Madge as Henrietta
 * Daisy as Annie
 * Toby as Fergus
 * Mavis as Henrietta
 * Skarloey as Luke
 * Buster as Stafford
 * Kevin as Kevin
 * Sir Handel as Splatter
 * Peter Sam as Dodge
 * Stepney as Toad
 * Bertie as Bash
 * Trevor as Dash
 * Arry as Patrick
 * Bert as Percy
 * Victor as Scruff
 * Spencer as Bulstrode
 * City Truro as Ferdinand
 * Terence as Pete (from The Little Engine That Could)
 * Stanley as Bear (from RWS)
 * Hiro as Whiff
 * Den as Big Mac (from TUGS)
 * Dart as Warrior (from TUGS)
 * Flynn as Nelson
 * Rosie as Old Slow Coach
 * Thomas as Diesel
 * Donald as Arry
 * Douglas as Bert
 * The Vicar of Wellsworth as Big Bird (from Sesame Street)
 * Mrs. Kyndley as Zoe (from Sesame Street)
 * Bertram as Captain
 * Rheneas as Victor
 * Stafford as Fergus
 * Oliver as Ned
 * Patrick as Diesel 10
 * Annie as Daisy
 * Percy as Max
 * D261 as Flying Scotsman (from RWS)
 * Duncan as Big City Engine (from RWS)
 * Belle as Clarabel
 * Colin as Big Mickey (from TUGS)
 * Lorry 2 as D261
 * Mr. Percival as Stan Marsh (from South Park)
 * Jeremy as Edward
 * Lady as Millie
 * The Spiteful Breakvan as Monty
 * Captain as Duncan
 * Harold as Gordon
 * Emily as Belle
 * Proteus as Butch
 * Elizabeth as Mavis
 * Isobella as Caroline
 * Whiff as Bill
 * Scruff as Ben
 * Dennis as Arthur
 * Rocky as Paxton
 * Bill as George
 * Ben as Smudger
 * Butch as BoCo
 * Hank as Henry
 * Neville as Ned
 * Clarabel as Caitlin
 * Bulgy as Sir Handel
 * Salty as Thumper
 * Miss Jenny as Marge (from The Simpsons)
 * The Foreman as Homer (from The Simpsons)
 * Jack as Freddie
 * Alfie as Rusty
 * Nelson as Billy
 * Oliver (Pack) as Colin
 * Murdoch as Scruffey
 * Smudger as Oliver (from Theodore Tugboat)
 * Molly as Catherine (from RWS)
 * Ned as Duck
 * Paxton as Skarloey
 * Sidney as Rheneas
 * Norman as Duke
 * Mighty as Lorry 1
 * Mac as Lorry 2
 * Ferdinand as Hector
 * Bash as Oliver (Pack)
 * Dash as Lorry 3
 * Hector as Den
 * Scruffey as Dart
 * Fred Pelhay (from RWS) as Sidney
 * Kelly as Stanley
 * Lorry 1 as Norman
 * Catherine (from RWS) as Lady
 * Porter as Thumper
 * Caroline as Molly
 * Arthur as Hiro
 * Bulstrode as Terence
 * Victoria (from RWS) as Victoria (from RWS)
 * Byron as Green Arrow (from RWS)
 * Cranky as Rocky
 * Freddie as Flynn
 * Rusty as Trevor
 * Harvey as Harvey
 * Billy as Puffa (from TUGS)
 * Charlie as Dennis
 * Sixteen (from RWS) as Bertie
 * Merrick as Clayton (from Theodore Tugboat)
 * Owen as Owen (from Theodore Tugboat)
 * Tiger Moth as Ten Cents (from TUGS)
 * Toad as Salty
 * Boulder as Iron Duke (from RWS)
 * Shelly the Pink Freight Car (a fan-made character) as Rosie
 * Big City Engine (from RWS) as City of Truro
 * Pinknose (a fan-made character) as Isobella
 * Thumper as Peter Sam
 * Winston as James