Characters played by Judy Loe
Cmdr. Kathryn McTiernan
Characters played by Angus MacInnes
Lt. Cmdr. Walter B. Shannon
Characters played by Bruno Eyron
Dusan Kashkavian
Characters played by Julia Bremermann
Henrietta 'Harry' Eschenbach
Characters played by Kourosh Asad
Dr. Kaveh Homayuni
Characters played by William Oliver
Chief Science Officer Lyle Campbell
Lyle Campbell
Characters played by Indra Ové
Paula Hernandez
Characters played by Sally Grace
Control
Characters played by Richard Hawley
Anderson
Characters played by Suzanne Hitchmough
Dr. Gail Mulloy
Characters played by David Hayman
Dr. Carl Sutter
Characters played by Barry Morse
Todd Brubaker
Characters played by Deborah Grant
Professor E. Weaver
Characters played by Tim Woodward
Mr. Hawkspur
Characters played by Lloyd Hutchinson
Glover
Characters played by James Faulkner
Jimmy Cleveland
Characters played by Gary Sefton
Lucas
Characters played by James Daley
Alexi Stepniak
Characters played by Colin Salmon
Duncan Mackenzie
Characters played by Stephanie Buttle
Mica
Characters played by Julie Graham
Michelle Stock
Characters played by Sara Stewart
Claudia Lang
Characters played by Martin Jarvis
Professor Jarvis
Characters played by Colin Buchanan
Ted Lansing
Characters played by Hannah Roberts
Orla Chartos
Characters played by Laura Gill
Young Kathryn
Characters played by Laura Gill
Young Kathryn