Terence/Spencer

Cast

 * Terence as Spencer (Terence and Spencer have both Square Faces)
 * Henry as Harvey (Henry and Harvey both start with H)
 * Edward as Percy
 * Derek as Mallard
 * Bulgy as Thomas
 * Bertie as Peter Sam
 * James as Edward (James and Edward are both Tender Engines)
 * Peter Sam as Hiro
 * Bash as Bash
 * Dash as Dash
 * Rusty as Fergus
 * The Spiteful Brakevan as Smudger
 * Donald as Den (Donald and Den both start with D)
 * Douglas as Dart (Douglas and Dart both start with D)
 * Murdoch as Murdoch
 * Judge Judy the Diesel as Elizabeth
 * Molly as Rosie
 * Toad as Kevin
 * Madge as Molly (Madge and Molly both start with M)
 * Toby as Skarloey
 * Den as Billy
 * Butch as Colin
 * Splatter as Bulgy
 * Dodge as George (George and Dodge are both Green)
 * Skarloey as Stepney
 * Trevor as Bertie
 * Fergus as Trevor
 * Paxton as Butch
 * Duck as Terence
 * Oliver as Frank (from RWS)
 * George as Patrick
 * Whiff as The Old Engine (from RWS)
 * Scruff as Fred (from RWS)
 * Bill as Donald
 * Ben as Douglas
 * The Goods Engine (from TUGS) as Charlie
 * Rosie as Madge
 * Diesel as The Spiteful Brakevan
 * Arry as Bill
 * Bert as Ben (Bert and Ben both start with B)
 * Stan Marsh (from South Park) as Mr. Percival
 * Wendy Testaburger (from South Park) as Mrs. Percival
 * Thomas as Scruff
 * Rheneas as Rheneas
 * Stepney as Rusty (Stepney and Rusty both end with Y)
 * Gordon as Dennis
 * Bluenose (from TUGS) as Arry
 * Issobella as Daisy
 * Duncan as Bert
 * BoCo as Sir Handel
 * Cranky as Gordon
 * Millie as Flora
 * Big Mickey (from TUGS) as Cranky
 * Smudger as Bulstrode
 * Homer (from The Simpsons) as Sir Topham Hatt
 * Marge (from The Simpsons) as Lady Hatt
 * Percy as Jeremy
 * Lady as Mavis
 * Scruffey as Diesel
 * Oliver (from Theodore Tugboat) as Scruffey
 * Stanley as Harold
 * Mavis as Emily
 * Jeremy as Duck
 * Harold as Salty
 * Casey Jr (from Casey Jr and Friends) as Flynn
 * Diesel 10 as Alfred the Loanded B12
 * Salty as Lord Harry (from RWS)
 * Patrick as Gored (from RWS)