Characters played by Doug McClure
Greg Collinson
Characters played by Peter Gilmore
Charles Aitken
Characters played by Shane Rimmer
Captain Daniels
Characters played by Lea Brodie
Delphine
Characters played by Michael Gothard
Atmir
Characters played by Hal Galili
Grogan
Characters played by John Ratzenberger
Fenn
Characters played by Derry Power
Jacko
Characters played by Donald Bisset
Professor Aitken
Characters played by Ashley Knight
Sandy
Characters played by Robert Brown
Briggs
Characters played by Cyd Charisse
Atsil
Characters played by Daniel Massey
Atraxon