The AB Chrysalis/Credits

Cast

 * Commander John Koenig - Martin Landau
 * Doctor Helena Russell - Barbara Bain
 * Maya - Catherine Schell
 * Alan Carter - Nick Tate
 * A - Ina Skriver
 * B - Sarah Douglas
 * Yasko - Yasuko Nagazumi
 * Bill Fraser - John Hug
 * Operative Kate - Sarah Bullen
 * C - David Sebastian Bach
 * Creature - Albin Pahernik
 * Command Center operative P Rose - Pam Rose
 * Command Center Operative Peter Reeves - Robert Reeves
 * Command Center Operative G Allen - Glenda Allen
 * Rescue Astronaut - Jenny Cresswell
 * Security Guard Pierce Quinton - Quentin Pierre
 * Alphan - Harry Fielder
 * Sphere Voice 248 & 748 - Robert Rietty