Kadro (17)
Cameron MitchellSteve Abbott
Arthur FranzDr. Jim Barker
Virginia HustonCarol Stafford
John LitelDr. Lane
Morris AnkrumIkron
Richard GainesProf. Jackson
Marguerite ChapmanAlitaLucille BarkleyTerris
Robert BarratTillamar
Edward EarleJustin (uncredited)
William ForrestGeneral (uncredited)
David BondDark-Haired Councillor (tally's votes)
David BondRamay (uncredited)
Stanley BlystoneCouncilman (uncredited)
Tris CoffinCommentator (uncredited)
Everett GlassMontar (uncredited)
Trevor BardetteAlzar (uncredited)