Richard Thorn
William Holden
Ann Thorn
Lee Grant
Pasarian
Allan Arbus
Murray
Fritz Ford
Dr Kane
Meshach Taylor
Colonel
Paul Cook
Minister
William B. Fosser
Greenhouse Technician
Corney Morgan
Sergeant #1
Thomas O. Erhart Jr.
Pasarian's Assistant
Sorin Serene Pricopie
Burial Priest
Charles Mountain
Dr. Fiedler
Felix Shuman
Damien Thorn
Jonathan Scott-Taylor
Technician #1
James Spinks
Byron
Owen Sullivan
Michael Morgan (uncredited)
Ian Hendry
Carl Bugenhagen (uncredited)
Leo McKern
Paul Buher
Robert Foxworth
Charles Warren
Nicholas Pryor
Bill Atherton
Lew Ayres
Aunt Marion
Sylvia Sidney
Sergeant Neff
Lance Henriksen
Joan Hart
Elizabeth Shepherd
Mark Thorn
Lucas Donat
Original Music Composer
Jerry Goldsmith
Director of Photography
Bill Butler
Characters
David Seltzer
Stunts
Kitty O'Neil
Director
Don Taylor
Screenplay
Mike Hodges
Stanley Mann
Producer
Charles Orme
Harvey Bernhard
Joseph Lenzi
Editor
Robert Brown
Story