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