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“We'd be better going the other way around where it's more spacious."
"But that's where the old mine shafts are, Monty. The ground isn't safe. You might be too heavy."
"Huh! And how would you know?"
"I'm a tunnel boring machine!"
"Exactly! You're boring!”
―Monty, Darcy and Max

Deep Trouble is the eighteenth episode of the twenty-third series.


Max and Monty's antics on a construction site get them into trouble when they ignore the danger warning signs and Monty falls down a mineshaft. Now Max must rely on Darcy (whom the two have teased beforehand) to rescue him.





US and CAN

  • Joseph May as Thomas
  • Teresa Gallagher as Brenda
  • Tim Whitnall as Oliver
  • David Menkin as Jack
  • Tom Stourton as Alfie
  • Kerry Shale as Max and Harold
  • Rob Rackstraw as Monty
  • Harriet Kershaw as Darcy, Jenny Packard and a Kangaroo
  • Shane Jacobson as Shane (uncredited)


  • A reference to the first series episode Down the Mine is made.
  • The fantasy sequence references the myth of being able to tunnel through the centre of the Earth to reach Australia.
  • This episode marks the only appearance of two things:
    • Rocky's only appearance in the twenty-third series.
    • The only time Shane, Aubrey, and Aiden appear outside of an international episode, albeit in a fantasy sequence.
  • This episode marks the last of two things:
    • The last appearances of the Pack and Miss Jenny.
    • The last time Belle's whistle sound was used.
  • This episode, along with Rangers of the Rails, are the last episodes to date to air on Nickelodeon in the US before Netflix picked up the series in March 2020.
  • The number one rule of the Pack, "Safety First," is mentioned for the first time since their spin-off series, as well as the last time overall.


  • In the aerial shot before Miss Jenny climbs into Max, some of the danger barriers which had previously been knocked over are missing. In the next aerial shot, they have reappeared.
  • In the fantasy sequence, Monty's lights are on and he is clean, but outside of it, he is dirty and his lights are off after falling down the mineshaft.
  • When Monty says "we'd be better going the other way around where it's more spacious," Oliver's tracks only move when he turns but otherwise remain stationary
  • Darcy's body is lifted slightly off her treads when Miss Jenny says "Right, everyone, to work!" In the same shot, Max and Monty's wheels have moved slightly before they reverse.
  • Shane Jacobson was not credited in the UK or US end credits for voicing Shane. Additionally Kerry Shale is not credited for voicing Harold in the US end credits.
  • While Thomas is taking Jack and Alfie along his branch line, Thomas' flatbed has rails on it, but when they arrive at the mines, the rails are gone.
  • When Max says "Wait your turn, Monty!", their dumping loads turn dark brown, but in the next scene, they turn grey again.
  • When Darcy and Monty emerge from the mineshaft, they both slide slightly to the left.
  • In the above shot of Harold surveying the sinkhole, his rotor blades are not attached to his cab.

In Other Languages

Language Title
Brazilian Portuguese Problema Profundo
Dutch Diep in de Problemen
Estonian Suur Pahandus
Finnish Syvä Ongelma
German Monty in der Klemme
Indonesian Masalah Besar
Italian Sprofondato nei Guai
Japanese モンティのふか~いもんだい
Korean 안전이 제일!
Latin American Spanish Problemas Profundos
Latvian Dziļās Nepatikšanas
Lithuanian Didelė Bėda
Polish Głębokie Kłopoty
Russian Большие неприятности
Spanish Un Profundo Lío

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