Roy Thinnes
David Vincent
Ford Rainey
Gen. Jonathan Blaine
Ian Wolfe
Secretary Knute Rosmundson
Ben Wright
Emissary
Peter Hobbs
Colonel
Martin West
Lieutenant
Vic Perrin
Hypnotist Alien
Don Lamond
Newsman
Victoria Hale
Hippie
William Boyett
Tressider's Man
William Windom
Michael Tressider
Eduard Franz
Premier Thor Halvorsen
Michael Rennie
Vice Chancellor Pierre Alquist
Diana Hyland
Ellie Markham
Hal Taggart
Alien (uncredited)
William Woodson
Narrator (voice) (uncredited)
Andrew J. McIntyre
Director of Photography
Don Medford
Director
Jodie Copelan
Editor
George Eckstein
Writer
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