Number 13 is a short film which is part of the British supernatural anthology series A Ghost Story for Christmas.

[1][2] It stars Greg Wise as Prof. Anderson, an academic who, whilst assigned to authenticate papers which appear to date back to the Reformation, stays in room 12 of a drafty hotel which has no room 13 in a small English cathedral town.

When he awakes one night to discover that the door to room 13 has mysteriously appeared, he decides to investigate, with fearful consequences.

"Number 13" was first released on DVD in Australia in 2011 by Shock Entertainment as part of the box set The Complete Ghost Stories of M. R.

[4][5] In 2023 it was released on Blu-ray by the BFI alongside "The Treasure of Abbot Thomas" (1974) "The Ash Tree" (1975), "The Signalman" (1976), "Stigma" (1977), "The Ice House" (1978), and "A View from a Hill" as Ghost Stories for Christmas - Volume 2.