William Peter Blatty

"Blatty, the bestselling author and Oscar Award-winning screenwriter of The Exorcist, lived a charmed life among the elite stars of Hollywood. His son Peter, born over a decade after The Exorcist, grew from an apple-cheeked boy into an 'imposing young man with a quick, warm smile.' But when Peter died very suddenly from a rare disorder, Blatty's world turned upside down. As he and his wife struggled through their unrelenting grief, a series of strange...

The frightening and realistic tale of an innocent girl inhabited by a terrifying entity, her mother's frantic resolve to save her, and two priests, one doubt-ridden, the other a rock of faith, joined in battling ultimate evil always leaves viewers breathless.Linda Blair and Ellen Burstyn in the two-time Academy Award(R) winner that shocked the world.

A young girl becomes possessed by the devil and causes several violent deaths before she can be cured. Added footage includes a "nervous disorder" diagnosis, expansion of Father Merrin's arrival before the ritual, priestly doubts during the ritual, an epilogue with Lt. Kinderman and Father Dyer, and a shattering staircase descent by Regan.

A policeman who doesn't believe in demoniac possession investigates a serious of mysterious murders.