| Episode | Credits | Transcript |
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