George C. Scott

Lt. William 'Bill' Kinderman

Ed Flanders

Father Joseph Kevin Dyer

Brad Dourif

James Venamun / The Gemini Killer

Jason Miller

Father Damien Karras / Patient X

Nicol Williamson

Father Morning

Scott Wilson

Dr. Temple

Nancy Fish

Nurse Allerton

George DiCenzo

Stedman

Don Gordon

Ryan

Lee Richardson

University President

Grand L. Bush

Sergeant Atkins

Mary Jackson

Mrs. Clelia

Viveca Lindfors

Nurse X

Ken Lerner

Dr. Freedman

Tracy Thorne

Nurse Keating

Barbara Baxley

Shirley

Zohra Lampert

Mary Kinderman

Harry Carey, Jr.

Father Kanavan

Sherrie Wills

Julie Kinderman

Edward Lynch

Patient A

Clifford David

Dr. Bruno

Alex Zuckerman

Korner Boy

Lois Foraker

Nurse Merrin

Tyra Ferrell

Nurse Blaine

James Burgess

Thomas Kintry

Kevin Corrigan

Altar Boy

Peggy Alston

Mrs. Kintry

John Durkin

Elderly Jesuit

Bobby Deren

Nurse Bierce

Jan Neuberger

Alice

Alexis Chieffet

Counter Attendant

Debra Port

Waitress

Walt MacPherson

Police Sergeant

David Dwyer

Second Police Officer

Danny Epper

Police Driver

William Preston

Old Man in Wheelchair

Chuck Kinlaw

Attendant

Demetrios Pappageorge

Casperelii

Nina Hansen

Little Old Lady

Samuel L. Jackson

Dream Blind Man

Shane Wexel

First Dream Boy (uncredited)

Ryan Paul Amick

Second Dream Boy (uncredited)

John Coe

Old Man in Dream (uncredited)

Jodi Long

First Dream Woman (uncredited)

Kathy Gerber

Second Dream Woman (uncredited)

Jan Smook

Radio Man (uncredited)

Amelia Campbell

Young Girl in Dream (uncredited)

Cherie Baron

Nurse

Larry King

Larry King

C. Everett Koop

Everett Koop

Patrick Ewing

Angel of Death

Clinton Brandhagen

Young Boy in Dream (uncredited)

Michael Criscuolo

Mental Patient (uncredited)

Cindy Cullom

Nurse (uncredited)

Colleen Dewhurst

Satan (voice) (uncredited)

Fabio

Angel (uncredited)

Randy Aaron Fink

Student (uncredited)

Jeff Henry

Angel (uncredited)

Patt Noday

Hospital Ward Priest (uncredited) (unconfirmed)

Manley Pope

Angel (uncredited)

John Thompson

John Thompson - Georgetown Hoyas Basketball Coach (uncredited)

Michael Tove

Man in Purgatory (uncredited)

Brad Waller

Asylum Inmate (uncredited)

Gary Wheeler

Crime Photographer (uncredited)

Teresa Wright

Penitent (uncredited)

Charles Edwin Powell

Patient X Possessed

William Peter Blatty

Director

Gerry Fisher

Director of Photography

William Peter Blatty

Screenplay

Peter Lee-Thompson

Editor

Mike Smithson

Prosthetic Supervisor

Donlee Jorgensen

Sound Editor

Richard Van Dyke

Sound Mixer

Hugh Scaife

Set Decoration

Cydney Cornell

Hair Supervisor

Jeff Burks

Animation Supervisor

Abe Milrad

Visual Effects Supervisor

Leslie Dilley

Production Design

Del Acevedo

Makeup Artist

Paul Stanhope Jr.

Makeup Supervisor

Warren Hamilton Jr.

Sound Editor

James Christopher

Sound Editor

Mat Beck

Visual Effects Supervisor

William Purcell

Special Effects Coordinator

Erin Koplow

Makeup Artist

Burness Dembrowski

Sound Editor

Robert Stadd

Visual Effects Producer

Henry Shaffer

Art Direction

Dana Lyman

Costume Design

Mike Chock

Sound Editor

Richard L. Anderson

Supervising Sound Editor

Patricia Grande

Hairstylist

Paul Huntley

Wigmaker

Robert C. Goldstein

Art Direction

Bill Forsche

Special Effects Makeup Artist

Jim Stephan

Stunts

Sharon Gerhard

Second Assistant Director

John Borland

Stunts

Dean Raphael Ferrandini

Stunts

George P. Wilbur

Stunts

Richard W. Abramitis

First Assistant Director

Kurt D. Lott

Stunts

Gary Baxley

Stunts

Chuck Waters

Stunt Double

Jon R. Tower

Gaffer

Jay C. Currin

Stunts

Daniel W. Barringer

Stunts

Tom Morga

Stunts

Paul Baxley

Second Unit Director

Greg Cannom

Special Effects Makeup Artist

Lane Leavitt

Stunts

Steve Maslow

Sound Re-Recording Mixer

Bill Varney

Sound Re-Recording Mixer

Bob Minkler

Sound Re-Recording Mixer

Joanne D'Antonio

Sound Editor

Jeffrey Hayes

Sound

Carter DeHaven

Producer

Barry De Vorzon

Original Music Composer

Todd C. Ramsay

Editor

Thom Noble

Editor

Joe Roth

Executive Producer

Steve Jaffe

Associate Producer

James G. Robinson

Executive Producer

William Peter Blatty

Novel

Sharon Benson

Special Effects Coordinator