William Holden
Richard Thorn
Lee Grant
Ann Thorn
Robert Foxworth
Paul Buher
Nicholas Pryor
Charles Warren
Lew Ayres
Bill Atherton
Sylvia Sidney
Aunt Marion
Lucas Donat
Mark Thorn
Jonathan Scott-Taylor
Damien Thorn
Lance Henriksen
Sergeant Neff
Elizabeth Shepherd
Joan Hart
Allan Arbus
Pasarian
Fritz Ford
Murray
Meshach Taylor
Dr Kane
John J. Newcombe
Teddy
John Charles Burns
Butler
Paul Cook
Colonel
Diane Daniels
Jane
Robert E. Ingham
Teacher
William B. Fosser
Minister
Corney Morgan
Greenhouse Technician
Russell P. Delia
Truck Driver
Judith Dowd
Maid
Thomas O. Erhart Jr.
Sergeant #1
Sorin Serene Pricopie
Pasarian's Assistant
Robert J. Jones Jr.
Tour Guide
Rusdi Lane
Jim Gardner
Charles Mountain
Burial Priest
Cornelia Sanders
Young Girl
Felix Shuman
Dr. Fiedler
James Spinks
Technician #1
Owen Sullivan
Byron
William J. Whelehan
Security Guard
Ian Hendry
Michael Morgan (uncredited)
Leo McKern
Carl Bugenhagen (uncredited)