A Warning to the Curious is a 1972 supernatural drama produced by the BBC as the second instalment of its A Ghost Story for Christmas strand. As with the previous instalment, The Stalls of Barchester (1971), it was adapted and directed by Lawrence Gordon Clark and was first broadcast on BBC 1 at 11pm on Christmas Eve 1972. Running at 50 minutes, the drama was based on "A Warning to the Curious", a ghost story by British writer M. R. James, included in his book A Warning to the Curious and Other Ghost Stories first published in 1925.