The Signalman is a 1976 BBC television adaptation of "The Signal-Man", an 1866 short story by Charles Dickens. The story was adapted by Andrew Davies as the BBC's sixth A Ghost Story for Christmas, with Denholm Elliott starring as the signalman and Bernard Lloyd as the traveller, an unnamed character who acts as a plot device in place of the short story's narrator.
Title screen, showing the cutting and the signal box.
"The Signal-Man" is a horror mystery story by Charles Dickens, first published as part of the Mugby Junction collection in the 1866 Christmas edition of All the Year Round. The story is told from a fictional first-person perspective.
An 1861 train crash at the Clayton Tunnel entrance near Brighton in West Sussex (here seen from the north) may have inspired the story