The fourth season of the television series first premiered on VHS before airing on TV in 1994, then premiered on TV in 1995. All twenty-six episodes were narrated by Michael Angelis in the UK and George Carlin in the US.
- Granpuff - Thomas tells the story of Duke and what happened to him after his railway closed.
- Sleeping Beauty - Thomas completes his story of Duke, telling how he was eventually rediscovered.
- Bulldog - Thomas tells Percy about the time Falcon was impatient and nearly paid dearly for it.
- You Can't Win - Duke proves he still has a lot of life left in him.
- Four Little Engines - Sir Handel derails, so Skarloey helps out.
- A Bad Day for Sir Handel - Sir Handel is in a bad mood.
- Peter Sam and the Refreshment Lady - Peter Sam's eagerness means the Refreshment Lady is nearly left behind.
- Trucks!/Rusty Helps Peter Sam - Gordon advises Sir Handel to get out of work by pretending to be ill, and Peter Sam pays the price.
- Home at Last - Skarloey returns from the Works.
- Rock 'n' Roll - Duncan is careless and gets in trouble after derailing on a bumpy line.
- Special Funnel - Peter Sam's funnel is knocked off by an icicle, and is temporarily replaced by a drainpipe.
- Steam Roller - Sir Handel matches wits with a steamroller.
- Passengers and Polish - Duncan refuses to move his train without being polished.
- Gallant Old Engine/The Gallant Old Engine - Skarloey tells Duncan the story of how Rheneas saved the railway.
- Rusty to the Rescue - Rusty travels to the Other Railway to find a steam engine.
- Thomas and Stepney - Thomas is jealous when Stepney comes to visit.
- Train Stops Play - Stepney "catches" a cricket ball in a truck, prompting a chase along the branch line.
- Bowled Out - A stuck-up Diesel makes a fool of himself, and Duck and Stepney save the day.
- Henry and the Elephant - After a circus leaves, Henry discovers an elephant in a tunnel.
- Toad Stands By - Toad advises Oliver on how to regain the trucks' respect.
- Bulls Eyes - Daisy teases Toby about his cowcatchers and side-plates, but learns that they are there for a reason.
- Thomas and the Special Letter - The engines receive a letter inviting them to visit the mainland, but Thomas' carelessness almost spoils the trip.
- Paint Pots and Queens/Thomas Meets the Queen - Henry upsets a painter, while Thomas and Gordon try to behave for Queen Elizabeth II's visit.
- Fish - Duck has a fishy surprise when he helps Henry with "The Flying Kipper".
- Special Attraction - Toby is upset when he realises there is no room for him at a seaside festival, but Percy proves they are all special anyway.
- Mind that Bike - Tom Tipper the postman is unhappy when his post van is replaced by a bicycle, but Percy helps him out, not in the way he intended.
- Donald and Douglas
- Annie and Clarabel
- Sir Topham Hatt
- The Crovan's Gate Policeman
- The Dryaw Policeman
- Bill and Ben (do not speak)
- BoCo (does not speak)
- Mavis (does not speak)
- Henrietta (does not speak)
- Bertie (does not speak)
- Diesel (cameo, mentioned)
- Terence (cameo)
- Trevor (cameo)
- Bulgy (cameo)
- Stephen Hatt (cameo)
- Mrs. Kyndley (cameo)
- Jem Cole (cameo)
- The Vicar of Wellsworth (cameo)
- Farmer Trotter (cameo)
- Bridget Hatt (music video cameo)
- The Storyteller (music video cameo)
- Sir Handel
- Peter Sam
- The Diesel
- S. C. Ruffey
- The Refreshment Lady
- Tom Tipper
- Queen Elizabeth II (does not speak)
- This was the first season to feature the Skarloey Railway.
- This is the first season not to end with a Christmas-themed episode.
- This was the first season to add the Proteus Ultra to compose the music.
- This was the last season of a few things:
- To date, this season introduced the most new characters.
- This season is unique as the first fifteen episodes were based primarily on the Skarloey Railway engines.
- This is the only season Percy's name was not titled in a episode in this season.
- All Chinese narrations from this season credit George Carlin as the narrator and all Norwegian/Hindi narrations credit Michael Angelis, even though the episodes were re-dubbed.
- In the Ukrainian narration, Michael Angelis' voice can be still heard in the background.