Richard Thorn

William Holden

Ann Thorn

Lee Grant

Damien Thorn

Jonathan Scott-Taylor

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

Pasarian

Allan Arbus

Dr. Kane

Meshach Taylor

Michael Morgan (uncredited)

Ian Hendry

Carl Bugenhagen (uncredited)

Leo McKern

Murray

Fritz Ford

Teddy

John J. Newcombe

Butler

John Charles Burns

Colonel

Paul Cook

Teacher

Robert Ingham

Truck Driver

Russell P. Delia

Minister

William B. Fosser

Greenhouse Technician

Corney Morgan

Maid

Judith Dowd

Sergeant #1

Thomas O. Erhart Jr.

Pasarian's Assistant

Sorin Serene Pricopie

Burial Priest

Charles Mountain

Dr. Fiedler

Felix Shuman

Pasarian's Assistant

Anthony Hawkins

Technician #1

James Spinks

Guide

Robert J. Jones Jr.

Byron

Owen Sullivan

Jim Gardner

Rusdi Lane

Girl

Cornelia Sanders

Guard

William J. Whelehan

Mike Hodges

Harvey Bernhard