Originally Posted by Welsh-lad:
“Hold on, lets consider the actual "plot hole" we are talking about here.
We are talking about railway geek guy not telling Sherlock that the neglected underground station under the palace of westminster is joined by a track to the circle line.
Well goodness me! If you find it astonishing that two underground stations (even disused ones) are connected by a track and that you are not told this in the dialogue... well I don't know what to say really.
That isn't a plot hole, it is just assuming people know that stations are connected by tracks.
Moreover I take issue with your point in general. Yes certain things are suggested or left to the reader/viewer to interpret in the majority of creative works.
If you find this too challenging then perhaps it'd be better to give Sherlock a miss until you've completed the John and Jane series.”
Seriously Welsh-Lad, you need to think about the position here.
The Sumatra station was disclosed as being built ON the line that the tube train with the missing passenger and missing car was using. There is no mention of additional lines, no mention of additional tunnels, no mention that there is a mystical extra link to a station that was never finished, just that the Sumatra station was built on the main line and never completed.
Your immediate jump to there being extra anything is something you have assumed and are happy to live with in the confines of enjoying the story. I am really happy for you that this is the case. I however who have moved way past the "John and Jane" books (as you so dismissively & rudely put it) expect both literature and video entertainment to provide enough DETAIL in a story that allows the viewer/reader to accept that the story has been coherently thought through.
One additional line of speech in the whole episode taking up a mere 5 seconds stating "The Sumatra station was built as a link station between X line & Y line" would have created an entirely believable option and reason for there to be an additional tunnel for a train car to be sat in without anyone noticing.