On screen
Cast
18 credited performers
Peter Graves
Jeff Knight
Eileen Dietz
Dana
Artwork unavailable
Paulette Breen
Lena
Frank Ashmore
George Walker
Dick Sargent
Dr. Jameson
Artwork unavailable
Zale Kessler
Dr. Nelson
Artwork unavailable
William Bufkin
Clone
Artwork unavailable
Tony Haig
Jack
Artwork unavailable
Boyd Holister
Senator
Keenan Wynn
Jake Noble
Lurene Tuttle
Anna Noble
Artwork unavailable
James Mantell
Ricky Knight
Artwork unavailable
David Hooks
Richard Knight
Frank Birney
Reporter Birney
Artwork unavailable
Rick DiAngelo
Guide #1
Eugene Robert Glazer
Guide #2 (as Gene Glazer)
Tim Donnelly
Richard (as Timothy Donnelly)
Chuck Hayward
Walker Man