"Toothache? He's got teething troubles. That means he's new and is causing some problems. In his case it's in his cooling system."
— Duck explaining teething troubles to the twins
Double Teething Troubles

David Mitton


Britt Allcroft
David Mitton


Britt Allcroft
David Mitton
David Maidment


Michael Angelis (UK)
Alec Baldwin (US)

Air date

September 29th,
1998 (UK)
December 8th,
1998 (AUS)
January 26th,
1999 (Canada)
September 7th,
1999 (US)
May 30th,
2000 (GER)
January 20th,
2004 (KOR)
August 11th,
2009 (HUN)

Previous episode

Haunted Henry

Next episode

Stepney Gets Lost

Double Teething Troubles is the twelfth episode of the fifth seasonIt aired during the third airing of Storytime with Thomas in the US.


Bill and Ben argue over who has rights to some trucks nearby, and despite BoCo's warnings, derail each other at the points. The Fat Controller decides to send a diesel to help them, but the diesel, Derek, is new and has problems with his cooling system, as seen after he breaks down on Gordon's Hill, prompting BoCo to rescue him. The news soon spreads, and Percy, who misunderstands Thomas when he mentions Derek has teething troubles, tells the horrified twins the diesel has a toothache. Duck tells the twins that "teething troubles" means that Derek is new and breaks down often, making the twins even more nervous. The next day, Derek arrives at the Clay Pits and helps the twins with a long train of China Clay trucks. However, Derek's engine overheats, and he stops. Bill and Ben pull him and the trucks and Derek is sent to the works. Bill and Ben apologize to BoCo for being rude and they and Duck talk about teething troubles all night long.




  • Stock footage from Cranky Bugs is used.
  • Teething troubles usually occur while steam engines, diesels, and other machinery are operating for the first time after being constructed or restored to working order.
  • S. C. Ruffey's face appears on a truck.
  • Not counting the stock footage cameo in Stepney Gets Lost, this is BoCo's last appearance to date.
  • Despite his appearance in the episode, Percy does not appear in the nameboard sequence at the end of the episode in the Japanese dub.


  • It is said that Bill and Ben heard an unfamiliar whistle (Derek's), but diesel locomotives have horns, not whistles.
  • A grey cord can be seen in Bill's cab when he's in the shed at the end.
  • In the first close-up of BoCo, his front wheels are derailed.
  • During the first night scene in the shed, a grey cord can be seen stretching along Bill's side.
  • When Percy leaves Thomas, Thomas' eyes are wonky.
  • The train next to Thomas passes him twice.
  • A rare picture from The Ultimate Diesel Guide shows Derek smiling after he overheats.
  • BoCo has Daisy's fourth season horn sound.


  • Bill: "That's my line of trucks!"
  • Ben: "It's not. It's mine! Yours is over there!"
  • Bill: "'Smine."
  • Ben: "'Snot."
  • Bill: "'Smine!"
  • Ben: "'Snot!"
  • BoCo: "Stop quarrelling you two or the only thing you'll have left to share is..." (Bill and Ben race towards the trucks but collide with each other at the points) "...trouble."
  • Bill: "Silly!"
  • Ben: "Silly yourself!"
  • Percy: "Hey you two! This new diesel's got toothache. Good luck!"
  • Bill: "Why does Percy want to wish us good luck?"
  • Ben: "Because he'll know we'll need it, a diesel with a toothache must be the worst diesel of all!"
  • Derek: "I'm overheating again!"
  • Bill: "Oh pah!"

In Other Languages

Language Name Meaning
Spanish Problemas de Convivencia Coexistence Troubles
Norwegian Bill og Ben er urolige Bill and Ben are Restless
Italian Un Diesel Novellino A Diesel Rookie
Japanese なかよくやろうよ Let's Get Along
Welsh Trafferthion Troubles
Greek Διπλό δυσκολίες στο ξεκίνημα Double Difficulties at the Start
Danish Diesel har startvanskeligheder Diesel Has Teething Problems
Slovenian Začetniške težave Teething Troubles
Russian Двойная проблема с зубами Double Trouble With Teeth
Chinese 双重牙齿有问题 Dual Dental Problems
Korean 쌍둥이 기관차 Twin Engine
Romanian Probleme cu Răcirea Problems with Cooling
Slovak Dvojité zubné problémy Double Dental Problems
Hungarian Fogas Gondok Gear Problems
German Kinderkrankheiten Teething
Polish Kłopoty Wieku Dziecięcego The Troubles of Children
Swedish Tvilling Trubbel Twin Trouble
Dutch Kinderziektes Teething
Thai หัวรถจักรฝาแฝดเถียงกัน Engine Twins Argued

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