Lt. William 'Bill' Kinderman

Father Joseph Kevin Dyer

James Venamun / The Gemini Killer

Father Damien Karras / Patient X

Father Morning

Dr. Temple

Nurse Allerton

Stedman

Ryan

University President

Sergeant Atkins

Mrs. Clelia

Nurse X

Dr. Freedman

Nurse Keating

Shirley

Mary Kinderman

Father Kanavan

Julie Kinderman

Patient A

Dr. Bruno

Korner Boy

Nurse Merrin

Nurse Blaine

Thomas Kintry

Altar Boy

Mrs. Kintry

Elderly Jesuit

Nurse Bierce

Alice

Counter Attendant

Waitress

Police Sergeant

Second Police Officer

Police Driver

Old Man in Wheelchair

Attendant

Casperelii

Little Old Lady

Dream Blind Man

First Dream Boy (uncredited)

Second Dream Boy (uncredited)

Old Man in Dream (uncredited)

First Dream Woman (uncredited)

Second Dream Woman (uncredited)

Radio Man (uncredited)

Young Girl in Dream (uncredited)

Nurse

Larry King

Everett Koop

Angel of Death

Young Boy in Dream (uncredited)

Mental Patient (uncredited)

Nurse (uncredited)

Satan (voice) (uncredited)

Angel (uncredited)

Student (uncredited)

Angel (uncredited)

Hospital Ward Priest (uncredited) (unconfirmed)

Angel (uncredited)

John Thompson - Georgetown Hoyas Basketball Coach (uncredited)

Man in Purgatory (uncredited)

Asylum Inmate (uncredited)

Crime Photographer (uncredited)

Penitent (uncredited)

Patient X Possessed

Editing

Writing

Writing

Camera

Art

Costume & Make-Up

Art

Visual Effects

Costume & Make-Up

Crew

Costume & Make-Up

Sound

Sound

Sound

Art

Costume & Make-Up

Costume & Make-Up

Sound

Sound

Sound

Costume & Make-Up

Crew

Sound

Visual Effects

Visual Effects

Art

Costume & Make-Up

Costume & Make-Up

Visual Effects

Acting

Crew

Lighting

Crew

Acting

Crew

Crew

Crew

Directing

Crew

Crew

Crew

Directing

Crew

Costume & Make-Up

Crew

Sound

Sound

Sound

Sound

Editing

Production

Sound

Editing

Editing

Production

Production

Production

Writing

Acting