George C. Scott
John Russell
Trish Van Devere
Claire Norman
Melvyn Douglas
Senator Carmichael
John Colicos
Captain DeWitt
Barry Morse
Parapsychologist
Madeleine Sherwood
Mrs. Norman
Helen Burns
Leah Harmon
Eric Christmas
Albert Harmon
Frances Hyland
Mrs. Grey
Ruth Springford
Minnie Huxley
James B. Douglas
Eugene Carmichael
J. Kenneth Campbell
Security Guard
Roberta Maxwell
Eva Lingstrom
Bernard Behrens
Robert Lingstrom
Jean Marsh
Joanna Russell
Chris Gampel
Mr. Tuttle
Voldi Way
Joseph Carmichael
Michelle Martin
Kathy Russell
Janne Mortil
Linda Grey
Terence Kelly
Sergeant Durban
Robert Monroe
Archives Clerk
Hagan Beggs
Coroner
Anna Hagan
Secretary
Antonia Rey
Estancia
Sammy Smith
Doorman
Paul Rothery
Tony Grey
Bruce MacLeod
Security Guard
Fred Latremouille
Airport Guard
David Peevers
Microfilm Clerk
Sera Johnstone
Sara Lingstrom
Adam Earle
Adam Lingstrom
Carl Boychuk
Music Student #1
Bryan King
Music Student #2
Susan Round
Music Student #3
Nicki Steida
Music Student #4
Randolph Blankinship
Pilot #1
Travis Major
Pilot #2
Kyle MacLachlan
Uncredited