George C. Scott

Lt. William 'Bill' Kinderman

Acting

Ed Flanders

Father Joseph Kevin Dyer

Acting

Brad Dourif

James Venamun / The Gemini Killer

Acting

Jason Miller

Father Damien Karras / Patient X

Acting

Nicol Williamson

Father Morning

Acting

Scott Wilson

Dr. Temple

Acting

Nancy Fish

Nurse Allerton

Acting

George DiCenzo

Stedman

Acting

Don Gordon

Ryan

Acting

Lee Richardson

University President

Acting

Grand L. Bush

Sergeant Atkins

Acting

Mary Jackson

Mrs. Clelia

Acting

Viveca Lindfors

Nurse X

Acting

Ken Lerner

Dr. Freedman

Acting

Tracy Thorne

Nurse Keating

Acting

Barbara Baxley

Shirley

Acting

Zohra Lampert

Mary Kinderman

Acting

Harry Carey, Jr.

Father Kanavan

Acting

Sherrie Wills

Julie Kinderman

Acting

Edward Lynch

Patient A

Acting

Clifford David

Dr. Bruno

Acting

Alex Zuckerman

Korner Boy

Acting

Lois Foraker

Nurse Merrin

Acting

Tyra Ferrell

Nurse Blaine

Acting

James Burgess

Thomas Kintry

Acting

Kevin Corrigan

Altar Boy

Acting

Peggy Alston

Mrs. Kintry

Acting

John Durkin

Elderly Jesuit

Acting

Bobby Deren

Nurse Bierce

Acting

Jan Neuberger

Alice

Acting

Alexis Chieffet

Counter Attendant

Acting

Debra Port

Waitress

Acting

Walt MacPherson

Police Sergeant

Acting

David Dwyer

Second Police Officer

Acting

Danny Epper

Police Driver

Crew

William Preston

Old Man in Wheelchair

Acting

Chuck Kinlaw

Attendant

Acting

Demetrios Pappageorge

Casperelii

Acting

Nina Hansen

Little Old Lady

Acting

Shane Wexel

First Dream Boy (uncredited)

Acting

Ryan Paul Amick

Second Dream Boy (uncredited)

Acting

John Coe

Old Man in Dream (uncredited)

Acting

Jodi Long

First Dream Woman (uncredited)

Acting

Kathy Gerber

Second Dream Woman (uncredited)

Acting

Samuel L. Jackson

Dream Blind Man (uncredited)

Acting

Jan Smook

Radio Man (uncredited)

Acting

Amelia Campbell

Young Girl in Dream (uncredited)

Acting

Cherie Baron

Nurse

Acting

Larry King

Larry King

Acting

C. Everett Koop

Everett Koop

Acting

Patrick Ewing

Angel of Death

Acting

Clinton Brandhagen

Young Boy in Dream (uncredited)

Acting

Michael Criscuolo

Mental Patient (uncredited)

Acting

Cindy Cullom

Nurse (uncredited)

Acting

Colleen Dewhurst

Satan (voice) (uncredited)

Acting

Fabio

Angel (uncredited)

Acting

Randy Aaron Fink

Student (uncredited)

Acting

Jeff Henry

Angel (uncredited)

Acting

Patt Noday

Hospital Ward Priest (uncredited) (unconfirmed)

Acting

Manley Pope

Angel (uncredited)

Acting

John Thompson

John Thompson - Georgetown Hoyas Basketball Coach (uncredited)

Acting

Michael Tove

Man in Purgatory (uncredited)

Acting

Brad Waller

Asylum Inmate (uncredited)

Acting

Gary Wheeler

Crime Photographer (uncredited)

Acting

Teresa Wright

Penitent (uncredited)

Acting

Charles Edwin Powell

Patient X Possessed

Acting