- Sylvester McCoy
- Â The Doctor 5 episodes, 2001-2002
- Sophie Aldred
- Â Ace 5 episodes, 2001-2002
- Leonard Fenton
- Â Casmus 5 episodes, 2001-2002
- Stephen Fry
- Â The Minister of Chance 5 episodes, 2001-2002
- John Sessions
- Â General Tannis 5 episodes, 2001-2002
- David Evans
- Â Pilot 5 episodes, 2001-2002
- Kevin Eldon
- Â Antimony 4 episodes, 2001-2002
- Jon Culshaw
- Â Senator Hawk / ... 4 episodes, 2001-2002
- Britta Gartner
- Â Sala 4 episodes, 2001-2002
- Stephen Brody
- Â Speedwell / ... 3 episodes, 2002
- Richard Garaghty
- Â Civilian / ... 2 episodes, 2001-2002
- Michael Yale
- Â Suneel 2 episodes, 2002
- Andrew McGibbon
- Â Captain Carne 2 episodes, 2002
- Robert Rietty
- Â Bedloe 2 episodes, 2002
- Peggy Batchelor
- Â The Kingmaker 2 episodes, 2002
- Gareth Jones
- Â Campion / ... 2 episodes, 2002
- Nik Romero
- Â Bander / ... 2 episodes, 2002
- Anthony Head
- Â Valentine 1 episode, 2002
- Dave Hill
- Â Nessican 1 episode, 2002
- Emma Owen
- Â Magan 1 episode, 2002
- Charlotte Palmer
- Â Doctor Cane 1 episode, 2002
- Julianne Davis
- Â Computer 1 episode, 2002
- Benjamin Langley
- Â Fighter Pilot 1 episode, 2001
- David Soul
- Â Mission Control 1 episode, 2002
- John Humphrys
- Â Policeman 1 episode, 2002
- Jacqueline Pearce
- Â Admiral Mettna 1 episode, 2001
- Huw Thomas
- Â President of Santine 1 episode, 2001
- Nicholas Courtney
- Â The Brigadier 1 episode, 2002
- Moray Treadwell
- Â Captain 1 episode, 2001
- Julienne Davis
- Â Computer unknown episodes
