- Season 1 - Thomas and Gordon (Clarabel only; cameo), Thomas and the Breakdown Train (do not speak), James and the Coaches (Annie cameo), Thomas and the Guard, Thomas Goes Fishing (do not speak), Thomas, Terence and the Snow, Thomas and Bertie, Tenders and Turntables (do not speak), Trouble in the Shed (do not speak), Percy Runs Away (do not speak), Coal (do not speak), Thomas in Trouble (cameo), Down the Mine, and Thomas' Christmas Party
- Season 2 - Thomas, Percy and the Coal (Clarabel does not speak), Thomas and Trevor, Percy and the Signal (deleted scene cameo), The Runaway, Better Late Than Never (do not speak), Thomas Comes to Breakfast (cameo), Daisy, Percy's Predicament (do not speak), Ghost Train (do not speak), Woolly Bear (cameo), and Thomas and the Missing Christmas Tree (do not speak)
- Season 3 - Percy's Promise (do not speak), Time for Trouble (cameo), Thomas Gets Bumped (do not speak), Trust Thomas (cameo), Tender Engines (cameo), Bulgy (cameo), Percy, James and the Fruitful Day, and Thomas and Percy's Christmas Adventure (cameo)
- Season 4 - Four Little Engines (cameo), Peter Sam and the Refreshment Lady (cameo), Rusty to the Rescue (cameo), Thomas and Stepney (cameo), Bowled Out (cameo), Henry and the Elephant, Thomas and the Special Letter, and Mind that Bike (cameo)
- Season 5 - Horrid Lorry (cameo), Gordon and the Gremlin (cameo), Baa! (cameo), Put Upon Percy, Haunted Henry (cameo), Thomas and the Rumours (cameo), Happy Ever After (cameo), Sir Topham Hatt's Holiday, Make Someone Happy (cameo), and Busy Going Backwards (cameo)
- Season 6 - Elizabeth the Vintage Lorry (Annie only; cameo), The Fogman (do not speak), It's Only Snow (cameo), Twin Trouble (do not speak), The World's Strongest Engine (cameo), Scaredy Engines (cameo), Middle Engine (cameo), James and the Red Balloon (cameo), Jack Frost (cameo), Gordon Takes a Tumble (cameo), Percy's Chocolate Crunch (cameo), and Thomas, Percy and the Squeak (do not speak)
- Season 7 - Emily's New Coaches, Percy Gets it Right (cameo), Bill, Ben and Fergus (cameo), What's the Matter with Henry? (cameo), James and the Queen of Sodor (cameo), Toby's Windmill (cameo), Something Fishy (cameo), Bulgy Rides Again (cameo), Harold and the Flying Horse (cameo), The Grand Opening (Annie only; cameo), Best Dressed Engine (cameo), Gordon and Spencer (cameo), Not So Hasty Puddings (cameo), and Three Cheers for Thomas (do not speak)
- Season 8 - Thomas and the Tuba (do not speak), Percy's New Whistle (cameo), Henry and the Wishing Tree (cameo), James Gets a New Coat (cameo), Thomas Saves the Day, Thomas, Emily and the Snowplough, Don't Tell Thomas (cameo), Emily's New Route (cameo), Thomas and the Firework Display (cameo), Gordon Takes Charge (cameo), Spic and Span (cameo), Thomas and the Circus (do not speak), As Good as Gordon (cameo), Emily's Adventure (cameo), and Chickens to School (do not speak)
- Season 9 - Percy and the Oil Painting (cameo), Thomas and the Rainbow (do not speak), Thomas and the Toy Shop, Thomas and the Birthday Picnic (do not speak), Thomas and the New Engine (do not speak), Toby Feels Left Out (do not speak), Emily Knows Best (cameo), Thomas' Day Off (cameo), and Bold and Brave (cameo)
- Season 10 - Percy and the Funfair (cameo), Thomas and the Jet Plane (do not speak), Toby's Afternoon Off (cameo), Seeing the Sights (do not speak), Toby's New Shed (do not speak), Topped Off Thomas (mentioned), Thomas and the Shooting Star (cameo), Sticky Toffee Thomas (cameo), Thomas and the Colours (do not speak), Thomas and the Treasure (cameo), and Thomas and Skarloey's Big Day Out (cameo)
- Season 11 - Emily's Rubbish (cameo), Dream On (cameo), Gordon and the Engineer (cameo), Edward and the Mail (cameo), Thomas in Trouble, and Percy and the Left Luggage (cameo), and Duncan Does it All (cameo)
- Season 12 - Thomas and the Billboard (cameo), Steady Eddie (cameo), Henry Gets It Wrong (cameo), Heave Ho Thomas! (cameo), Toby's Special Surprise (cameo), Saved You! (cameo), Tram Trouble (do not speak), Percy and the Bandstand (cameo), and Best Friends (do not speak)
- Season 13 - Double Trouble (do not speak), The Early Bird (cameo), Play Time (do not speak), Time For a Story (do not speak), Toby's New Whistle (cameo), Splish, Splash, Splosh! (mentioned), Henry's Good Deeds (do not speak), and Hiro Helps Out (cameo)
- Season 14 - James in the Dark (cameo), Pingy Pongy Pick Up (do not speak), Thomas and the Snowman Party (do not speak), Thomas and Scruff (cameo), Jitters and Japes (cameo), and Henry's Magic Box (cameo)
- Season 15 - Gordon and Ferdinand (cameo), Percy's New Friends (cameo), Edward the Hero (cameo), and Percy the Snowman (cameo)
- Season 16 - Ol' Wheezy Wobbles (cameo), Express Coming Through (do not speak), Percy and the Monster of Brendam (cameo), Thomas and the Sounds of Sodor (cameo), Salty's Surprise (cameo), and Welcome Stafford (cameo)
- Season 17 - Gordon Runs Dry (do not speak), Scruff's Makeover, and Steamie Stafford (cameo)
Specials:
- 1988 - A Late Start for Thomas, Thomas and the Horse (Annie cameo; Clarabel mentioned), Trouble in the Shed (Annie only; cameo), and Percy Runs Away (Annie does not speak; Clarabel mentioned)
- 1989 - Fire (Annie does not speak; Clarabel mentioned')
- 1990 - Thomas and the Umbrella (mentioned)
- 1993 - Keeping Cool! (mentioned) and The Wedding Engine! (do not speak)
- 1994 - A Special Treat for Thomas (cameo) and The New Station
- 1996 - Important Passengers! (do not speak), Monkey Business! (mentioned), Sunday Schedule! (Annie only; cameo), A Day at the Beach! (Annie, does not speak; Clarabel, mentioned), and Play Time! (cameo)
- 1997 - Diesel Becomes a Coach, Annie and Clarabel, and Carrying Coal! (Annie - cameo; Clarabel - mentioned)
- 1998 - The Red Squirrel! (Annie only; does not speak), Thomas and Bertie!, The Carnival! (cameo), The Exhibition! (Annie does not speak), The Greenhouse Bus! (Annie only; cameo), and Billy's Bones! (cameo)
- 2000 - Turntable Bridge! (Annie only; cameo) and Back to Front! (Clarabel does not speak)
- 2001 - The Eyesight Test (Annie; mentioned), Choc-o-BoCo! (Annie only; cameo), and Thomas Chimes In (Annie only; mentioned)
- 2002 - The Winning Shot (do not speak), Time Trouble! (cameo), and The Flower Festival (Annie only; cameo)
- 2003 - Seaside Search! (do not speak)
- 2004 - Going for a Swim! (do not speak), Special Signal (do not speak), Holiday Train (Annie only; possible cameo), and Holiday Hat (possible cameo)
- 2005 - Slide and Ride and Really Useful Coaches
- 2007 - Yacht Race (Annie or Clarabel cameo), Surprise Visitor (cameo), Rocky Ride, Sleepy Sam (cameo), Seeing the Sights (cameo), and Look and Hook (Annie only; possible cameo)
- 2008 - Mystery Music and A Spring Clean! (do not speak)
- 2009 - Thomas Saves the Day and Spring Time Special (do not speak)
- 2010 - Christmas Dinner Diner (Annie only; cameo), Surprise Visitor (cameo), Henry Gets It Wrong! (cameo), Seeing Sheep! (do not speak), Emily's Lucky Day (do not speak), Saving Santa! (do not speak), and Halloween Hats (Annie only; cameo)
- 2011 - Jitters and Japes (cameo), Time For a Story (mentioned), Musical Trucks (cameo), The Glow Train (Annie only; cameo), The Flying Teapot (mentioned in US version), Strawberry Special (cameo), and Tidy Thomas (do not speak)
- 2012 - Double Trouble (Annie, does not speak; Clarabel, possible cameo), Smiles All Round, Bird Watch (Annie only: cameo), Team Spirit Time! (Annie only: cameo), The Fat Controller's Bedtime Story (Issue 647) (Annie, mentioned), Going Rusty (Annie, does not speak; Clarabel, mentioned), City of Truro (cameo), and Thomas and the Sound of Sodor (Annie, does not speak; Clarabel, cameo)
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