Cast
Martin Landau as Commander John Koenig
Barbara Bain as Dr. Helena Russell
Nick Tate as Alan Carter
Zienia Merton as Sandra 'Sahn' Benes
Barry Morse as Prof. Victor Bergman [ 1 ]
Catherine Schell as Maya [ 2 ]
Tony Anholt as Tony Verdeschi [ 2 ]
Anton Philips as Dr. Mathias
Prentis Hancock as Paul Morrow [ 1 ]
Clifton Jones as David Kano [ 1 ]
Suzzanne Roquette as Tayna Alexander [ 1 ]
John Hug as Bill Fraser [ 2 ]
Jeffrey Kissoon as Dr. Ben Vincent [ 2 ]
Yasuko Nagazumi as Yasko Nugami [ 2 ]
Sam Dastor as Dr. Ed Spencer [ 2 ]
Alibe Parsons as Alibe [ 2 ]

Series 1: 24 Episodes
Series 2: 24 Episodes