Cast
Michael Sarrazin
Peter Proud
Jennifer O'Neill
Ann Curtis
Margot Kidder
Marcia Curtis
Cornelia Sharpe
Nora Hayes
Paul Hecht
Dr. Samuel Goodman
Tony Stephano
Jeff Curtis
Norman Burton
Dr. Frederick Spear
Anne Ives
Ellen Curtis
Debralee Scott
Suzy
Steve Franken
Dr. Charles Crennis
Fred Stuthman
Pop Johnson
Lester Fletcher
Car Salesman
Paul Nevens
Room Clerk
Breanna Benjamin
Miss Hagerson
Addison Powell
Reeves
Phillip Clark
Number Five
Gene Boland
Charlie
Albert Henderson
Police Sergeant
Connie Garrison
Ellie
Sam Laws
Satan's Disciple
Mary Margaret Amato
Nurse
Terry Green
College Student
Jacqueline Manning
Lab Assistant
Henry Cosimini
Square Dance Caller
Douglas Rutherford
Club Steward
Marjorie Eaton
Astrology Lady (as Marjorie Morley Eaton)
Shelley St. Clair
Bookstore Clerk
Jon Richards
Newspaper Custodian
Crew
Charles A. Pratt
Executive Producer
(Production)
Frank P. Rosenberg
Producer
(Production)
Jerry Goldsmith
Original Music Composer
(Sound)
Jack Martin Smith
Production Design
(Art)
Robert De Vestel
Set Decoration
(Art)
Barbara Krieger
Set Decoration
(Art)
Jack H. Young
Makeup Artist
(Costume & Make-Up)
Hal Blair
Production Manager
(Production)
David 'Buck' Hall
Second Unit
(Crew)
Jack Brown
Camera Intern
(Camera)
John Caper Jr.
Music Editor
(Sound)
Dan Wallin
Scoring Mixer
(Sound)
Margaret Hanly
Script Supervisor
(Directing)
Max Ehrlich
Writer
(Writing)
J. Lee Thompson
Director
(Directing)
Jim Danforth
Visual Effects
(Visual Effects)
Michael F. Anderson
Editor
(Editing)
Terence Anderson
Additional Editor
(Editing)
Irving Lande
Casting
(Production)
Jack Martin Smith
Art Direction
(Art)
Bob O'Bradovich
Makeup Artist
(Costume & Make-Up)
Mike Maggi
Makeup Artist
(Costume & Make-Up)
David 'Buck' Hall
Assistant Director
(Directing)
Ralph S. Singleton
Second Assistant Director
(Directing)
Gary Daigler
Second Assistant Director
(Directing)
Bernard F. Pincus
Sound Editor
(Sound)
John Wilkinson
Sound Re-Recording Mixer
(Sound)
Andrew Gilmore
Production Sound Mixer
(Sound)
Jim Danforth
Matte Painter
(Visual Effects)
Max Ehrlich
Novel
(Writing)
Virginia Jones
Hairstylist
(Costume & Make-Up)
Victor J. Kemper
Director of Photography
(Camera)