The Furthest Station

There is something strange happening on the Metropolitan line, and Sergeant Jaget Kumar knows exactly who to call. It's PC Peter Grant's specialty. Only, it's more than just strange occurrences. Traumatized commuters have been reporting unusual encounters during their morning commute, with oddly dressed individuals attempting to deliver an urgent message. What's even stranger is that despite contacting the police themselves, the commuters quickly forget the encounters, making follow-up interviews quite challenging. So, with the assistance of Abigail and Toby, the ghost-hunting dog, Peter and Jaget are embarking on a ghost-hunting expedition. Because uncovering the ghost's identity and deciphering their urgent message could be a matter of life and death.