Something in the London Underground—King's Cross line, October evening

I'm still shaken up enough that I need to write this down. Posted to a couple of forums but this community seems sensible so I'm reposting here.

When: Tuesday 17th October, around 6:45pm
Where: King's Cross St Pancras station, on the Northern Line heading south
Conditions: Train was moderately busy but not packed. Fluorescent lights normal. Temperature normal.

I was on my commute home, nothing unusual. Got on at King's Cross heading towards Stockwell. The train pulled out and I was reading my book. Then the lights flickered - not uncommon on that line. But when they came back on, there was something else in the carriage that hadn't been there before.

I need to be clear: I didn't see it arrive. I didn't see a door open or someone board. The lights flickered and it was just there, standing in the far end of the carriage, back to me. About 6.5 feet tall, very thin, wearing dark clothes.

And then the train went through a tunnel and I felt this overwhelming sense of wrongness. Not fear exactly. More like every nerve ending was screaming that something was fundamentally not right about the presence of that thing on the train.

Lights came back on as we approached the next station. It was gone.

I got off at the next stop. Walked home. Haven't been on the Underground since.

The Underground system in London is properly documented as a paranormal hotspot. There's been sightings reported regularly since the '80s. King's Cross specifically has history - that's a liminal space, transition point, old tunnels that predate the current system. Not surprised something was down there.

The 'sense of wrongness' is important. That's not fear - that's accurate perception of something that isn't right. Your nervous system was picking up on something your conscious mind couldn't process.

Alternatively: you experienced a fugue state or temporal lapse. Your conscious memory created a 'person' to fill in the missing information. The brain does this - it's called confabulation. The sense of wrongness could have been disorientation from the fugue state itself rather than an external entity.

Not dismissing your experience, but that's the prosaic explanation. Have you had any other episodes of dissociation or missing time?

Have you checked if anyone else reported anything odd that evening on that line? Sometimes multiple witnesses come forward if they know others saw it. The TfL staff might have records of complaints or unusual incidents.

The thing about the Underground is it's basically ancient ground. London's been built and rebuilt over thousands of years. The Northern Line specifically runs through some seriously old geology. Some researchers reckon the underground system taps into something that was already here. Not trying to spook you more but yeah, something down there.

I won't pretend to know what you saw. But I will say: trusting your instincts and avoiding that line is sensible. Some places and things deserve to be avoided. There's no shame in that.

The King's Cross connection genuinely gives me chills - that whole area has an unusual history even before you factor in the '87 fire. There's documented accounts of strange activity at that station going back decades.

What struck me reading your account was the detail about the eyes. I follow BEK reports pretty closely and the Underground setting matches a few older UK cases I've read. Not saying that's definitely what you encountered, but the combination of enclosed space, artificial lighting, and that particular wrongness you're describing lines up with other testimonies.

@randy_holroyd - did it acknowledge you at all? Any attempt at communication or was it just there? That detail matters quite a bit for narrowing down what category of experience this might fall into.

Also worth logging the exact time and platform. These things often cluster around specific locations rather than moving about randomly.