Dog and Cat


 * Bill's Voice Suits Dog
 * Ben's Voice Suits Cat

Episode
=D= =M= =P= =W= Season 3 - Gordon and the Famous Visitor (cameo), Buzz, Buzz (do not speak), One Good Turn, Oliver Owns Up (Bill or Ben cameo), and Heroes Season 4 - Thomas and the Special Letter (do not speak) Season 5 - Double Teething Troubles Season 6 - Salty's Secret, No Sleep for Cranky, A Bad Day for Harold the Helicopter (cameo), and Buffer Bother Season 7 - Bill, Ben and Fergus Season 8 - Thomas to the Rescue (deleted scene) Season 9 - Thomas' New Trucks and Bold and Brave (Ben only) Season 10 - Edward Strikes Out (cameo) Season 11 - Dream On (cameo) and Hector the Horrid! Season 12 - Gordon Takes a Shortcut (Ben only) Season 17 - Percy's Lucky Day, Bill or Ben?, and Gone Fishing Specials:
 * The Diseasel (Monkey and Friends episode)
 * Donkey's Exploit (do not speak)
 * Monkey and the Missing Christmas Tree (cameo)
 * Penguin Takes the Plunge (not named)
 * Wrong Road (Monkey and Friends episode)

Calling All Engines! (Trying, music video cameo) The Great Discovery (do not speak)