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