Robert Glenister and Ian McDiarmid star in a gripping BBC Radio 4 dramatisation of William Peter Blatty’s classic horror novel. Summoned to a case of apparent possession, Father Karras is at first sceptical then horrified. The victim - a 12-year-old girl named Regan - seems to be controlled by a malignant supernatural force that makes her swear, blaspheme, scream in agony and perform appalling acts.

For over 20 years, Belasco House has stood empty. Regarded as the Mt. Everest of haunted houses, its shadowed walls have witnessed scenes of unimaginable horror and depravity. All previous attempts to probe its mysteries have ended in murder, suicide, or insanity.

But now, a new investigation has been launched, bringing four strangers to Belasco House in search of the ultimate secrets of life and death. A wealthy publisher, brooding over his impending death, has paid a physicist and two mediums to establish the facts of life after death once and for all. For one night, they will investigate the Belasco House and learn exactly why the townsfolk refer to it as the Hell House.

Jeremy Thorn and his wife, Katherine, have just welcomed the newest member of their family to the world: Their beautiful son Damien. But as the boy grows, so does the terror surrounding him. Fatal accidents, suicides, and unexplained violence seem to follow the Thorns wherever they go - but why? And how can Damien have anything to do with the carnage and bloodshed? He is only a child. But Damien Thorn is like no child on Earth. He bears the mark of the beast. And his time is at hand.

Four seekers have come to the ugly, abandoned old mansion: Dr. Montague, an occult scholar looking for solid evidence of the psychic phenomenon called haunting; Theodora, his lovely and lighthearted assistant; Eleanor, a lonely, homeless girl well acquainted with poltergeists; and Luke, the adventurous future heir of Hill House.

When Dr. Louis Creed takes a new job and moves his family to the idyllic, rural town of Ludlow, Maine, this new beginning seems too good to be true. Yet despite Ludlow's tranquility, there's an undercurrent of danger that lingers...like the graveyard in the woods near the Creeds' home, where generations of children have buried their beloved pets.