Chuggington Wiki
Main Page

This article is about the episode. You may be looking for the book.

“Hey, does anyone know where this tunnel goes?”

Koko and the Tunnel is the fourth episode of the first season.


On the way to the Training Yard, Koko spots a tunnel near the platform. Curious, she asks Vee a multitude of questions about it but gets no satisfactory answer. Later, she and Wilson sneak down it, but Koko comes off the rails! What will they do now?


Rolling Stock






  • This episode marks the first for a couple things:
    • The first appearance of Irving.
    • One of the first episodes, along with Wilson and the Elephant to air on Playhouse Disney in the United States.
    • The first non-speaking role of Harrison.
    • The first speaking appearance of Chatsworth, barring the US and Croatian dubs.


  • The Vee pole Koko interacts with loses her screen after the first shot of the episode.
  • When Calley backs up to the magnet car, her coupling rods do not move.
  • In this episode, Wilson, Brewster and Koko did not know how to switch points to a track. But in the previous episodes, they were capable of switching points to tracks with no problem.
  • Since Koko is electric, when she came off the rails, her wheels would not be able to move. If Koko had jumped, she should have gone straight forward.
  • In the UK and international dubs, Chatsworth's mouth does not move when he greets Wilson and Koko.
  • The captions for the BBC iPlayer release of the episode misnames Calley as "Kelly".
  • In the first scene of the episode, Irving clips through a bumper.


Other Languages

View content
Language Title
Finnish Tunneliseikkailu
French Koko et le grand Tunnel
German Koko und der Tunnel
Japanese ココとトンネル
Polish Koko i tunel
Russian Коко и туннель
Spanish Koko y el túnel (Latin America)

Home Media Releases