On screen
Cast
72 credited performers
Keir Dullea
Devon
Robin Ward
Garth
Gay Rowan
Rachel
Artwork unavailable
William Osler
Mu Lambda 165 (aka: Host Computer)
Artwork unavailable
James Barron
Garth's Father
Artwork unavailable
Aileen Seaton
Rachel's Mother
Walter Koenig
Oro
Artwork unavailable
Scott Fisher
#4
Allen Stewart-Coates
Computer voices (voice)
Ed Ames
Mr. Smith
Sterling Hayden
Old Jeremiah
Artwork unavailable
George Sperdakos
Jubal
Gillie Fenwick
Old Abraham
Artwork unavailable
Sean Sullivan
Rachel's Father
Kay Hawtrey
Garth's Mother
Alexandra Bastedo
Idona
Stephen Young
Dr. Chris
Frank Converse
Dr. Gerald W. Aaron
John Colicos
The Governor
Barry Morse
Shaliff
Lloyd Bochner
Col. M.P. Garoway
Artwork unavailable
David Tyrell
One - Captain
Artwork unavailable
Susan Stacey
Five
Simon Oakland
Dr. Asgard
Percy Rodriguez
Sakharov Richards
Angel Tompkins
Daphne
Donnelly Rhodes
Roloff
Henry Beckman
William
Edward Andrews
Linus Farthing
William Hutt
Dr. Pete Marshall
Antoinette Bower
Dr. Heather Marshall
Ivor Barry
Chief Rathe Masters
Doug McGrath
Sergeant
Artwork unavailable
Vivian Reis
Jane
Artwork unavailable
Clive Endersby
1st Tube Dweller
Artwork unavailable
Alan Bleviss
2nd Tube Dweller
Artwork unavailable
Carol Lazare
Teale
Diana Barrington
Janice
Artwork unavailable
Ted Beatie
Old Man
Artwork unavailable
Lillian Graham
Old Woman
Artwork unavailable
Gina Dick
Supervisor
Michael Tough
#2
Artwork unavailable
Ricky O'Neill
#6
Artwork unavailable
Mark Lynas
#7
Artwork unavailable
Trudy Young
Lethe
Artwork unavailable
Iréna Mayeska
Dr. Diana Tabor
Artwork unavailable
Tim Whelan
Village Elder
Artwork unavailable
John Bethune
Villager "A"
Nerene Virgin
Valerie
Artwork unavailable
Calvin Butler
Cort
Artwork unavailable
William Clune
Captain
Artwork unavailable
Danny Hodgkins
Monster
Artwork unavailable
Pat Galloway
Trent
Doris Petrie
Nurse
Artwork unavailable
Patty Elsasser
Secretary
Artwork unavailable
Les Rubie
City Man
Artwork unavailable
Budd Knapp
Dr. Martin Trask
Artwork unavailable
Meg Hogarth
Dr. Jean Pelletier
Artwork unavailable
William Kemp
Captain
Artwork unavailable
Michael Zenon
Commander
Artwork unavailable
David Mann
Astrogator
Patricia Collins
Serina
Artwork unavailable
Leo Leydon
Brant
Artwork unavailable
Dino Narizzano
Dumal
Artwork unavailable
Jeff Toner
Jardy
Artwork unavailable
Patricia Moffatt
Tau Zeta (voice)
Artwork unavailable
Linda Sorensen
McBride
Alan McRae
Callisher
John Friesen
Keeble
Nuala Fitzgerald
Reena
Artwork unavailable
Richard Alden
Mike
Artwork unavailable
Diane Dewey
Technician