Guest host Kate Burton presents some unusual chillers for Halloween. Edgar Allan Poe is haunted by a childhood memory in Russell Banks’ “The Caul,” performed by Richard Masur. Poe’s eerie “The Raven” is performed by Rene Auberjonois, Fionnula Flanagan, Isaiah Sheffer, and Harris Yulin. A dying emperor tries to communicate in “An Imperial Message,” by Franz Kafka, performed by Kaneza Schaal. And Agatha Christie tells a ghost story in “The Lamp,” performed by Rita Wolf.