Standard Gauge and Narrow Gauge is a promotional video for Blue Mountain Mystery, and it tells the differences between both standard and narrow gauge. Keith Wickham narrates the video.



  • This video marks the first time that the Culdee Fell Railway is mentioned in the television series.


  • The Narrator says there are only two track gauges on Sodor but Arlesdale Railway uses a third, minimum gauge.
    • This was likely because the North Western Railway and the Skarloey Railway were the only railways featured in the television series at that time and it woudn't be until three years later in Sodor's Legend of the Lost Treasure that the Arlesdale Railway would finally appear.



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