Barbara Bain (Dr. Helena Russel)
Roy Dotrice (Commissioner Simmonds (1975))
Clifton Jones (David Kano)
Martin Landau (Commander John Koenig)
Zienia Merton (Sandra Benes)
Nick Tate (Alan Carter)
Barry Morse (Professor Victor Bergman (1975))
Prentis Hancock (Paul Morrow)