The twelfth series of Thomas & Friends began airing in September 2008. It was the first series to utilise CGI elements, with the vehicles' faces being animated in CGI and other characters being fully CGI animated. There are twenty episodes in this series and all were narrated by Michael Angelis in the UK and Michael Brandon in the US. Pierce Brosnan was originally meant to narrate this series in both English dubs, but he was eventually replaced by Angelis and Brandon, respectively.
|Screenshot||UK title (top)|
US title (bottom)
|Written by||Original UK release date||Episode number #|
|Thomas and the Billboard||Mark Robertson||1 September 2008||#01|
|Diesel obscures Thomas in a photograph of the engines.|
|Steady Eddie||Sharon Miller||2 September 2008||#02|
|Edward takes the Great Waterton water wheel on the scenic route to show off to his friends.|
|Rosie's Funfair Special|
Rosie's Carnival Special
|Andrew Viner||3 September 2008||#03|
|Rosie and Emily are pulling a train for a fair, but Rosie wants to pull it alone.|
|Mountain Marvel||Sharon Miller||4 September 2008||#04|
|Peter Sam rushes to finish his jobs in order to hear a tale about Proteus from the famous storyteller, Miss Marvel.|
|Henry Gets it Wrong||Abi Grant||5 September 2008||#05|
|Henry worries that the workmen are going to cut down the wishing tree.|
|Heave Ho Thomas!||Sharon Miller||8 September 2008||#06|
|A large new engine called Hank arrives, but Thomas is determined not to need his help.|
|Toby's Special Surprise||Sharon Miller||9 September 2008||#07|
|Toby wants to make an impression by searching Sodor for something special.|
|Excellent Emily||Paul Larson||10 September 2008||#08|
|Emily becomes arrogant after receiving praise from the Fat Controller.|
|The Party Surprise||Simon Spencer||11 September 2008||#09|
|Freddie decides to reorganise a winter party from Mr. Percival's house to the Wharf as a surprise for Colin the crane.|
|Saved You!||Paul Larson||12 September 2008||#10|
|Thomas wants to prove his heroism when he learns a fireman is to be honoured.|
|Duncan and the Hot Air Balloon||Mark Robertson||15 September 2008||#11|
|Mr. Percival's twins are getting a ride in the Hot Air Balloon for their birthday, but Duncan wants to take them himself.|
|James Works it Out||Simon Spencer||16 September 2008||#12|
|When James ignores Hector's advice, he gets caught in bad winter weather.|
|Tram Trouble||Sharon Miller||17 September 2008||#13|
|Toby and Flora are heading a parade at Great Waterton; Thomas thinks Toby would rather lead the event on his own and tries to distract Flora.|
|Don't Go Back||Simon Spencer||18 September 2008||#14|
|Thomas and Diesel race backwards.|
|Gordon Takes a Shortcut||Wayne Jackman||19 September 2008||#15|
|Gordon gets lost while taking a shortcut and refuses to ask for help.|
|The Man in the Hills||Sharon Miller||22 September 2008||#16|
|Thomas and the narrow gauge engines collect presents for Mr. Percival's birthday.|
|Thomas Puts the Brakes On||Mark Robertson||23 September 2008||#17|
|Thomas' brakes malfunction while delivering bricks to repair a bridge.|
|Percy and the Bandstand||Paul Larson||24 September 2008||#18|
|Percy is tasked with bringing Lady Hatt to a surprise party, but the unknowing Lady Hatt tells him to go elsewhere.|
|Push Me, Pull You||Sharon Miller||25 September 2008||#19|
|Skarloey refuses Rheneas' help to pull a train for a puppet show and ends up playing the trucks' games.|
|Best Friends||Anna Starkey||26 September 2008||#20|
|Thomas tries to avoid telling Percy he has been given a job Percy wants to do.|
- Donald and Douglas
- Sir Handel
- Peter Sam
- Sir Topham Hatt
- Lady Hatt
- Mr. Percival
- Dusty Miller
- The Photographer
- The Engineer
- The Dairy Manager
- Mighty Mac (Mighty speaks; but Mac does not)
- Stepney (Does not speak in UK dub)
- Harvey (does not speak)
- Arthur (does not speak)
- 'Arry and Bert (do not speak)
- Annie and Clarabel (do not speak)
- Henrietta (does not speak)
- Rocky (does not speak)
- Trevor (does not speak)
- Alfie (does not speak)
- Jeremy (does not speak)
- Cranky (does not speak)
- Dowager Hatt (does not speak)
- Mrs. Percival (does not speak)
- Jenny Packard (does not speak)
- Sodor Brass Band (does not speak)
- The Dockyard Manager (does not speak)
- Three members of the Railway Board (not named; do not speak)
- Bulgy (cameo)
- Max or Monty (cameo)
- Big Mickey (cameo)
- Farmer Trotter (cameo)
- Cyril the Fogman (cameo)
- Proteus (mentioned, seen as a statue)
- The Mayor of Sodor (mentioned)
- Molly (learning segment)
- Dennis (learning segment)
- The Balloon Repairman
- The Bargeman
- The Tree Specialists (do not speak)
- Mr. Giggles (does not speak)
- Miss Marvel (does not speak)
- The Fireman (does not speak)
- The Schoolchildren (do not speak)
- The Percival Children (The Percival Twins; do not speak: The rest of them; cameo)
- The Ginger-haired Boy (cameo)
- The Blond-haired Boy (cameo)
- The Teacher (cameo)
- The Welsh Bird Watcher (cameo)
- The Female Puppet Show Entertainer (cameo)
Half Hour Format
When series 12 aired on PBS Kids, Nick Jr. UK and Treehouse, each broadcast had 2 episodes from series 12, a segment dedicated to one of Thomas' friends and past animated learning segments and songs from series 8, 9 and 10 were used.
- Best Friends
- Learning Segment: Dot to Dot - Emily
- Song: H is for Harold
- Thomas' Favourite Friends - Rosie and Molly
- Learning Segment: What is Henry Thinking of?
- Henry Gets it Wrong
- Thomas and the Billboard
- Learning Segment: Guess the Engine - Percy
- Learning Segment: Who Should Take the Telegraph Pole?
- Thomas' Favourite Friends - Toby
- Learning Segment: Which Way Should Thomas and Emily Go?
- Learning Segment: Which Whistle Suits Thomas?
- Steady Eddie
- Heave Ho Thomas!
- Learning Segment: Guess the Engine - James
- Song: Pride
- Thomas' Favourite Friends - Henry
- Learning Segment: Which Engine for Which Job?
- Toby's Special Surprise
- Don't Go Back
- Learning Segment: Dot to Dot - Gordon
- Learning Segment: Over the Bridge
- Thomas' Favourite Friends - Gordon
- Learning Segment: Which Track for Henry?
- Learning Segment: Emily Huffs out of the Station
- Percy and the Bandstand
- Thomas Puts the Brakes On
- Learning Segment: Guess the Engine - Emily
- Song: Brave
- Thomas' Favourite Friends - Neville and Dennis
- Learning Segment: Getting There
- Gordon Takes a Shortcut
Presents and Prizes
- The Man in the Hills
- Learning Segment: Dot to Dot - Edward
- Learning Segment: What is Thomas Thinking of?
- Thomas' Favourite Friends - Harold and Jeremy
- Learning Segment: Which Load to Which Station?
- Excellent Emily
- Tram Trouble
- Learning Segment: Dot to Dot - Toby
- Song: Responsibility
- Thomas' Favourite Friends - Edward
- Learning Segment: Who Can get to the Washdown?
- James Works it Out
- Rosie's Funfair Special
- Learning Segment: Dot to Dot - Percy
- Song: Togetherness
- Thomas' Favourite Friends - Diesel
- Learning Segment: Which Load for Which Party?
- Push Me, Pull You
- Duncan and the Hot Air Balloon
- Learning Segment: Dot to Dot - Thomas
- Learning Segment: What Does Toby see?
- Thomas' Favourite Friends - The Narrow Gauge Engines
- Learning Segment: Percy's Treasure
- Mountain Marvel
- Saved You!
- Learning Segment: Dot to Dot - Gordon
- Song: Doing it Right
- Thomas' Favourite Friends - Percy
- Learning Segment: Surprise Destinations
- The Party Surprise
- This was the first series of several things:
- The first series where all engines' faces, human characters, animals and environmental surroundings are in full CGI and have animation.
- Sharon Miller's first series as head writer.
- Claire Waxler's first series as supervising producer, albeit uncredited, while being her first and only series as animation coordinator.
- The first series to be in 1080p progressive scan full high definition.
- The first series to have twenty episodes.
- The first series produced and to contain CGI by Nitrogen Studios.
- The first HiT series recorded and edited in 25 FPS (aside from the end credits).
- The first Thomas & Friends production since Thomas and the Magic Railroad in which humans and animals are shown walking onscreen.
- The first series to premiere on Milkshake! before the half hour airings on Nick Jr. in the UK.
- The first series since their debuts where Arthur, Arry, Rocky, Cranky and Alfie appear, but do not speak in any of their appearances.
- The first series in which Stephen Hatt does not appear.
- The first series to have Mark Robertson write episodes for the series.
- The first series in which Butch does not appear since his introduction in the fifth series.
- The first series in which each characters have their own voices in the South Korean dub.
- The first series where James only speaks in two episodes.
- This was also the last series of several things as well:
- The last series to use models and resin faces, however the resin faces were only used in background shots.
- Simon Spencer's last series as producer and showrunner.
- The last series filmed at Shepperton Studios.
- The last series to feature songs composed by Ed Welch.
- The television series veteran Steve Asquith's final series as director.
- The last production to have all of the characters voiced by the narrator until Thomas Goes to New York.
- The last series to have Abi Grant, Simon Spencer, and Wayne Jackman apart of the writing team.
- The last time Paul Larson writes an episode until the seventeenth series as well as the last series where he writes an episode by himself.
- The final time until the eighteenth series episode, Samson Sent for Scrap to use the brake sound from The Train.
- The last series to have songs sung by children until The Adventure Begins.
- The last series since to have 7-minute episodes until the twenty-second series.
- The last series to open with Awdry's letter to Christopher in television broadcasts.
- The last series until the seventeenth to not feature Thomas or any Steam Team member in every episode.
- This was also the only series of several things as well:
- The only series to use a hybrid model/CGI mix.
- Dino Athanassiou's only series as CGI director.
- Pete Atkin's only series as voice director.
- The only series where Ben appears without Bill.
- The only series where Cranky appears, but doesn't speak since his introduction.
- The only series not shown on Japanese television, but some episodes have been shown exclusively at Thomas Land's 3D Theatre and Video on Demand in Japan.
- The only series to not be completely dubbed in Japanese.
- The only CGI series not to have a full voice cast for the characters outside of France and Korea.
- The only series to have Anna Starkey write an episode for the series.
- The only series to have Andrew Viner write for the series until the sixteenth series.
- The only series not dubbed in Dutch.
- The only series where Flora, Hank and Colin appear. Colin was meant to appear in King of the Railway, but was cut for unknown reasons.
- The only series to not include an original music video.
- Aside from the Teacher and the tree specialists, all of the characters introduced in this series have only ever appeared in their debut episodes.
- This series contained the 300th episode of the television series, which was James Works it Out.
- Pierce Brosnan was originally hired to narrate this series after The Great Discovery, but he was withdrawn from the series and Michael Angelis and Michael Brandon returned to replace Brosnan. Brosnan is known to have recorded narration for, at the very least, several episodes of the series.
- This is the second series after the ninth series in which Spencer does not appear.
- In the UK, this series had been shown before The Great Discovery, meaning that the audience may not have known about Stanley or Great Waterton.
- This series was never shown in Hungary, Norway, Romania, Poland and the Netherlands, meaning audiences will not know about any of the new characters introduced in this series.
- Harvey and Arthur were the only engines not to utilise CGI face masks. However, two pictures from a magazine story shows Harvey with a CGI face.
- Despite using CGI for the engines' faces, there are scenes that show some characters with their face castings.