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The twenty-first series of Thomas & Friends started airing on 18th September 2017. It is the shortest series to date with 18 episodes and was narrated by Mark Moraghan.

Episodes

Screenshot UK title (top)
US title (bottom)
Written by Original UK release date Episode number #
SpringtimeforDieselSpringtime for DieselDavey Moore18th September 2017#01
Daisy's springs need fixing after Diesel bumps her and when the rumours spread about Daisy not being able to be mended, Diesel begins to worry.
AMostSingularEngineA Most Singular EngineDavey Moore19th September 2017#02
Diesel causes trouble between Daisy and Harvey by spreading rumours.
DowagerHatt'sBusyDayDowager Hatt's Busy DayLee Pressman20th September 2017#03
Dowager Hatt runs the railway while Sir Topham is away, but causes confusion and delay.
StuckinGearStuck in GearDavey Moore21st September 2017#04
A branch gets stuck in the gears of Harvey's crane, but he does not want to make a fuss about it.
RunawayEngineRunaway EngineHelen Farrall22nd September 2017#05
After mocking the way she was speaking up for herself, Stephen thinks that Millie ran away after hurting her feelings.
PAProblemsP.A. ProblemsLee Pressman25th September 2017#06
The Fat Controller's new public address system causes havoc at Knapford station.
HastyHannahHasty HannahLee Pressman26th September 2017#07
A new coach temporarily replaces Henrietta while she is at the works.
CrankyattheEndoftheLineCranky at the End of the LineLee Pressman27th September 2017#08
Cranky thinks he will be replaced by a big, new, fancy crane.
NewCraneontheDockNew Crane on the DockLee Pressman28th September 2017#09
Cranky competes against Carly the new crane when she starts taking all his work and both of them get quite the surprise at the end of the day...
UnscheduledStopsUnscheduled StopsHelen Farrall29th September 2017#10
Thomas starts making unscheduled stops for his passengers, which in turn delays others.
Philip'sNumberPhilip's NumberLee Pressman2nd October 2017#11
Philip tries to discover why he has the number 68 painted on his side after being teased about it.
TheFastestRedEngineonSodorThe Fastest Red Engine on SodorHelen Farrall3rd October 2017#12
After Rosie is repainted red, she and James have a race.
AShedforEdwardA Shed for EdwardLee Pressman4th October 2017#13
Edward searches for a new shed while his berth at Tidmouth is being repaired.
TheBigFreezeThe Big FreezeHelen Farrall1st December 2017#14
When a big freeze hits Sodor, Diesel finally proves himself to be a hero.
EmilyintheMiddleEmily in the MiddleDavey Moore6th December 2017#15
Emily gets stuck in the middle while helping Donald and Douglas.
TerenceBreakstheIceTerence Breaks the IceLee Pressman11th December 2017#16
Terence takes a shortcut across a frozen lake while collecting Christmas trees.
Daisy'sPerfectChristmasDaisy's Perfect ChristmasDavey Moore18th December 2017#17
Daisy is disappointed when her Christmas does not go exactly as planned.
ConfusedCoachespromoConfused CoachesHelen Farrall22nd December 2017#18
Spencer and Gordon upset their passengers when their competitive behaviour gets out of hand.

Songs

Characters

Characters Introduced

Cast

UK, AUS and NZ

US and CAN

Trivia

  • Arc Productions had produced the first seven episodes and Terence Breaks the Ice before their bankruptcy.
  • This series contains the 500th episode of the show, P.A. Problems.
  • This is the third series not to have Thomas' name titled in any of the episodes, the first being the fifteenth series and the second being the twentieth series.
  • This series marks the first of many things:
    • The first series to have no episodes written by Andrew Brenner during his tenure as head writer.
    • The first series to be produced by Mattel Creations.
    • Ian McCue's first series as creative executive and the first series to have him as part of the voice cast.
    • Micaela Winter's first series as producer for the series.
    • Sukhmani Kaur's first series as assistant production manager.
    • Zahara Andrews' first series as production co-ordinator.
    • Alan Kennedy's first series as director of post-production.
    • Ryan Quaglia's first series as post-production editor.
    • Gavin Ebedes' first series as supervising editor.
    • Terence, Bulgy and Farmer Finney's first appearances in full CGI.
    • Hackenbeck Tunnel, Terence's Field and Suddery Junction's first appearance in full CGI.
    • Big Mickey's first appearance with a face in the television series.
    • The first series where Caitlin appears, but without Connor who does not appear since his introduction in King of the Railway.
    • The first series in which Hiro does not appear since his introduction in Hero of the Rails.
    • The first series in which Scruff does not appear since his introduction in the fourteenth series.
    • The first series in which Oliver and Toad do not appear since their returns in the eighteenth series.
    • The first series in which Samson does not appear since his introduction in the eighteenth series.
    • The first Series in which where Bill and Ben appear, but not with Timothy and Marion since their introductions in Tale of the Brave. Making it also the first series to not feature the Sodor China Clay pits.
    • The first series since the sixteenth where Stanley appears, but does not speak.
    • The first series since the fifteenth not to introduce any new engines.
    • The first series since the sixteenth to have all of its episodes released in the same year.
    • The first series to have episodes fully animated by Jam Filled.
    • The first series not to be dubbed in Dutch since the twelfth series.
  • This is the only series for a few things:
    • The only series to date where Duck, Caitlin, Stafford, Rheneas, Mike and Oliver the Excavator appear, but do not speak since their introductions or reintroductions respectively.
    • The only series to date in which Farmer Finney has a speaking role.
    • The only series in CGI where Bill and Ben appear, but do not speak.
    • The only series since his return in the Eighteenth Series where Duncan does not appear.
  • This series also marks the last of several things:
    • Mark Moraghan's last series as narrator for the UK and US dubs.
    • The last series to utilise the original storytelling format.
    • Boris Andreev's last series as art director.
    • Alan Kennedy's last series as post-production supervisor.
    • Gavin Ebedes' last series as editor.
    • The last series to have Helen Farrall as part of the writing team.
    • The final series in which the Steam Team consists of all eight of its original members.
    • The final series to have Edward, Henry and Toby as main characters and members of the Steam Team.
    • The final series to have an episode where Thomas isn't featured at all. From the twenty-second series onwards, he appears and narrates every episode (the latter on a permanent basis).
    • Currently, the final series where Donald, Douglas, Mavis, Stafford, Rheneas, Rex, Bert, and Mike appear.
    • The last series to use the Engine Roll Call on a regular basis.
    • The last series to air on Family Jr. in Canada. Treehouse TV in Canada took over from the twenty-second series onwards.
    • The last series not dubbed in Finnish.
    • The last series to air it's episodes within one year in the UK.
  • This is the shortest series of the main series to date, with a total of only eighteen episodes. Originally, a full 26-episode series was planned, but eight were cut to make way for the development of Big World! Big Adventures! and the twenty-second series. In addition to this, Sodor Island Forums confirmed that the reduced total of episodes was needed to make up for the delayed productions of the nineteenth and twentieth series, due to The Adventure Begins being fast-tracked into Arc Productions' schedule. Whilst it has been confirmed that an episode about Rosie before the events of Hasty Hannah and The Fastest Red Engine on Sodor and Cautious Connor was part of the series before being pushed forward to the twentieth series, the nature of the other four episodes is currently unknown.

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