Hector Hugh Munro

The Open Doors is a short British film based on a short story "The Open Window" by Saki. (imdb)

The story concerns a slowly dying ten-year-old boy named Conradin, who lives with his strict cousin and guardian, Mrs. De Ropp. Conradin rebels against her and invents a new religion for himself, which centres on idolising a polecat-ferret he calls Sredni Vashtar; a vengeful, merciless god. (Mubi.com)

A disturbed young man is plagued by horrific headaches that he believes make him commit murders. (imdb)

The last regularly scheduled television series to be broadcast live in the U.S. Featured dramatizations of ghost stories and other tales of the supernatural, many of which were adapted from stories by famous authors like Conrad Aiken and Edgar Allan Poe.

David Bradley's Sredni Vashtar by Saki (1940-43) boasts an inadvertent post-modern attitude. On the Unseen Cinema DVD set.