Characters played by Keir Dullea
Devon
Characters played by Robin Ward
Garth
Characters played by Gay Rowan
Rachel
Characters played by William Osler
Computer
Host
Characters played by James Barron
Garth's Father
Characters played by John Colicos
The Governor
Characters played by Gillie Fenwick
Old Abraham
Characters played by Scott Fisher
Small Boy
Characters played by Paul Geary
The Guard
Characters played by Kay Hawtrey
Garth's Mother
Characters played by Sterling Hayden
Jeremiah
Characters played by Dominic Hogan
The Priest
Characters played by Michael Kirby
The Captain
Characters played by Barry Morse
Shalith
Characters played by George Naklowyck
The Deputy
Characters played by Aileen Seaton
Rachel's Mother
Characters played by George Sperdakos
Jubal
Characters played by Sean Sullivan
Rachel's Father