- Britt Allcroft
- (creator) (16 episodes, 2018)
- Wilbert Awdry
- (railway series) (16 episodes, 2018)
- Andrew Brenner
- (writer: "The Great Race") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Away From the Sea", "Too Many Fire Engines" and "Not So Slow Coaches") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Emily Saves the World") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Emily Saves the World", "Samson at Your Service", "Samson Sent for Scrap" and "Duck and the Slip Coaches") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Henry Spots Trouble" and "Henry's Hero") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Henry's Happy Coal" and "Henry Gets the Express") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "No Snow for Thomas" and "Best Engine Ever") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Not Now, Charlie!") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Not So Slow Coaches", "Diesel and the Ducklings", "Emily Saves the World" and "Kevin's Cranky Friend") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Percy's Lucky Day") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Pouty James" and "Reds vs Blues", "Philip to the Rescue", "The Smelly Kipper" and "Henry Gets the Express") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Sidney Sings" and "Scruff's Makeover") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "The Truth About Toby" and "Signals Crossed") (uncredited) (unknown episodes)
- Andrew Brenner
- (head writer: "Thomas and the Emergency Cable", "Reds vs Blues", "No Help at All", "Timothy and the Rainbow Truck" and "Engine of the Future") (uncredited) (unknown episodes)
- Andrew Brenner
- (writer: "Away From the Sea" and "Two Many Fire Engines") (uncredited) (unknown episodes)
- Andrew Brenner
- (writer: "Best Engine Ever") (uncredited) (unknown episodes)
- Andrew Brenner
- (writer: "Pouty James", "Philip to the Rescue" and "The Smelly Kipper") (uncredited) (unknown episodes)
- Andrew Brenner
- (writer: "Thomas and the Emergency Cable", "No Help at All" and "Engine of the Future") (uncredited) (unknown episodes)
- Andrew Brenner
- (writer: "Thomas' Shortcut") (uncredited) (unknown episodes)
- Sharon Miller
- (head writer: "Henry's Happy Coal") (uncredited) (unknown episodes)
- Sharon Miller
- (head writer: "Stop That Bus!") (uncredited) (unknown episodes)
- Sharon Miller
- (writer: "Henry's Happy Coal") (uncredited) (unknown episodes)
- Sharon Miller
- (writer: "Stop That Bus!") (uncredited) (unknown episodes)
- Sharon Miller
- (head writer: "Emily and Dash") (uncredited) (unknown episodes)
- Sharon Miller
- (head writer: "Express Coming Through", "Stop That Bus!", "Stuck on You", "Surprise, Surprise" and "Ol' Wheezy Wobbles") (uncredited) (unknown episodes)
- Sharon Miller
- (head writer: "Flash Bang Wallop!" and "Stuck on You") (uncredited) (unknown episodes)
- Sharon Miller
- (head writer: "James to the Rescue" and "Race to the Rescue") (uncredited) (unknown episodes)
- Sharon Miller
- (head writer: "Percy's New Friend") (uncredited) (unknown episodes)
- Sharon Miller
- (head writer: "Percy's New Friends") (uncredited) (unknown episodes)
- Sharon Miller
- (head writer: "Toby and Bash" and "James to the Rescue") (uncredited) (unknown episodes)
- Sharon Miller
- (writer: "Emily and Dash") (uncredited) (unknown episodes)
- Sharon Miller
- (writer: "Express Coming Through", "Stop That Bus!", "Stuck on You", "Surprise, Surprise" and "Ol' Wheezy Wobbles") (uncredited) (unknown episodes)
- Sharon Miller
- (writer: "Happy Birthday Sir!") (uncredited) (unknown episodes)
- Sharon Miller
- (writer: "James to the Rescue", "Race to the Rescue" and "Don't Bother Victor!") (uncredited) (unknown episodes)
- Sharon Miller
- (writer: "Stuck on You") (uncredited) (unknown episodes)
- Sharon Miller
- (writer: "Toby and Bash" and "James to the Rescue") (uncredited) (unknown episodes)
- Laura Beaumont
- (writer: "Emily Saves the World") (uncredited) (unknown episodes)
- Laura Beaumont
- (writer: "Henry's Happy Coal") (uncredited) (unknown episodes)
- Laura Beaumont
- (writer: "Henry's Hero") (uncredited) (unknown episodes)
- Laura Beaumont
- (writer: "No Snow for Thomas") (uncredited) (unknown episodes)
- Laura Beaumont
- (writer: "Not So Slow Coaches" and "Emily Saves the World") (uncredited) (unknown episodes)
- Laura Beaumont
- (writer: "Not So Slow Coaches") (uncredited) (unknown episodes)
- Paul Larson
- (writer: "Emily Saves the World") (uncredited) (unknown episodes)
- Paul Larson
- (writer: "Henry's Happy Coal") (uncredited) (unknown episodes)
- Paul Larson
- (writer: "Henry's Hero") (uncredited) (unknown episodes)
- Paul Larson
- (writer: "No Snow for Thomas") (uncredited) (unknown episodes)
- Paul Larson
- (writer: "Not So Slow Coaches" and "Emily Saves the World") (uncredited) (unknown episodes)
- Paul Larson
- (writer: "Not So Slow Coaches") (uncredited) (unknown episodes)
- Davey Moore
- (writer: "Henry Spots Trouble") (uncredited) (unknown episodes)
- Davey Moore
- (writer: "Not Now, Charlie!") (uncredited) (unknown episodes)
- Davey Moore
- (writer: "Percy's Lucky Day") (uncredited) (unknown episodes)
- Davey Moore
- (writer: "Reds vs Blues" and "Timothy and the Rainbow Truck") (uncredited) (unknown episodes)
- Davey Moore
- (writer: "Reds vs Blues") (uncredited) (unknown episodes)
- Davey Moore
- (writer: "Samson at Your Service") (uncredited) (unknown episodes)
- Davey Moore
- (writer: "The Truth About Toby") (uncredited) (unknown episodes)
- Max Allen
- (writer: "Emily's Winter Party Special") (uncredited) (unknown episodes)
- Max Allen
- (writer: "Percy and the Calliope") (uncredited) (unknown episodes)
- Helen Farrall
- (writer: "Henry Gets the Express") (uncredited) (unknown episodes)
- Gerard Foster
- (writer: "Percy's New Friends") (uncredited) (unknown episodes)
- Mark Huckerby
- (writer: "Samson Sent for Scrap" and "Duck and the Slip Coaches") (uncredited) (unknown episodes)
- Mark Huckerby
- (writer: "Signals Crossed") (uncredited) (unknown episodes)
- Nick Ostler
- (writer: "Samson Sent for Scrap" and "Duck and the Slip Coaches") (uncredited) (unknown episodes)
- Nick Ostler
- (writer: "Signals Crossed") (uncredited) (unknown episodes)
- Lee Pressman
- (writer: "Diesel and the Ducklings" and "Kevin's Cranky Friend") (uncredited) (unknown episodes)
- Lee Pressman
- (writer: "Sidney Sings" and "Scruff's Makeover") (uncredited) (unknown episodes)
- Ian McCue
- (writer: "Meet the Contenders: Shane") (uncredited) (unknown episodes)
- Jessica Sandys Clarke
- (writer: "Flash Bang Wallop!") (uncredited) (unknown episodes)
- Dan Wicksman
- (writer: "Thomas Toots the Crows") (uncredited) (unknown episodes)
- Nuria Wicksman
- (writer: "Thomas Toots the Crows") (uncredited) (unknown episodes)
