Kevin Conway
The Control Voice (voice) (uncredited) (22 eps)
Sam Vincent
Akira Matsumoto (2 eps)
Nicole Oliver
Jill Cooper (1 eps)
Gabrielle Miller
Charlotte Nichols (1 eps)
Michael Sarrazin
Stranger (1 eps)
Colin Cunningham
Professor George Ernst (1 eps)
Mark Hamill
Dr. Sam Stein (1 eps)
Joely Fisher
Amy (1 eps)
Jessica Steen
Gina Beaumont (1 eps)
Alan Ruck
Howard Sharp (1 eps)
Alan Rachins
Maculhaney (1 eps)
Wil Wheaton
Cadet (1 eps)
Jon Cryer
Trevor McPhee (1 eps)
Joanna Gleason
Leslie (1 eps)
David Hyde Pierce
Dr. Jack Henson (1 eps)
Jasmine Guy
Captain Teri Washington (1 eps)
Dana Ashbrook
Cain (1 eps)
Gary Jones
Duncan (1 eps)
Clint Howard
Dennis (1 eps)
Michael O'Keefe
Eddie Wexler (1 eps)
Diana Scarwid
Elizabeth Halsey (1 eps)
Donnelly Rhodes
Senator (1 eps)
Adrian Holmes
Soldier (1 eps)
Catherine Mary Stewart
Joanne Sharp (1 eps)
Robert Patrick
Major John Skokes (1 eps)
Dean McDermott
Ray Carter (1 eps)
Matt Frewer
Norman Glass (1 eps)
Bruce Harwood
Dr. Norris (1 eps)
M. Emmet Walsh
Sanford Vallé (1 eps)
Debrah Farentino
Dr. Rachel Carter (1 eps)
Erich Anderson
Evan Robert Cooper (1 eps)
Stephen McHattie
Dr. Sherrick (1 eps)
Robert Foxworth
President Charles Halsey (1 eps)
Michael Gross
Professor Stanley Hurst (1 eps)
Michelle Forbes
F.B.I. Agent Jamie Pratt (1 eps)
Xander Berkeley
Terry McCammon (1 eps)
Clancy Brown
Sergeant Linden Styles (1 eps)
Ally Sheedy
Carter Jones (1 eps)
Tygh Runyan
James Scardale (1 eps)
Heather Graham
Alicia (1 eps)
Victor Garber
Dr. Ben McCormick (1 eps)
Costas Mandylor
Lee Taylor (1 eps)
Chad Willett
Lt. Christopher Lindy (1 eps)
Harold Gould
Gerry (1 eps)
David Fredericks
Sheriff Lewis (1 eps)
Nick Mancuso
Martin (1 eps)
Eric Keenleyside
Peters (1 eps)
Jayne Heitmeyer
Barbara (1 eps)
Jessica Lundy
Theresa McPhee (1 eps)
Brent Spiner
Professor Trent Davis (1 eps)
Colm Feore
Major Mackie (1 eps)
Barbara Garrick
Dr. Ellen Kersaw (1 eps)
Amanda Plummer
Dr. Theresa Givens (1 eps)
Sheena Easton
Melissa McCammon (1 eps)
Kristin Lehman
Janet Marshall (1 eps)
Robert Lewis
Commander Guy LeClerc (1 eps)
Peter Breck
Kendal's Father (1 eps)
Jan D'Arcy
Senator Sara Watson (1 eps)
Mel Harris
Dr. Christina Markham (1 eps)
Graham Greene
Chief Weapons Officer (1 eps)
Finn Carter
Courtney Bowe (1 eps)
Kavan Smith
Harrison Taylor (1 eps)
Christianne Hirt
Sheila Morrison (1 eps)
Scott Hylands
Dr. Howard Sarrazin (1 eps)
Campbell Lane
Roland Baker (1 eps)
Peri Gilpin
Dr. Rebecca Warfield (1 eps)
Geraint Wyn Davies
Sheriff Grady Markham (1 eps)
Neil Patrick Harris
Howie Morrison (1 eps)
Andrea Roth
Dr. Dana Elwin (1 eps)
Brad Loree
Patrol Android (1 eps)
Michelle Johnson
Ady Sutton (1 eps)
Lawrence Dane
General Covington (1 eps)
Bonnie Bedelia
Nancy McDonald (1 eps)
Tom Butler
Dr. Werner (1 eps)
Janyse Jaud
Woman on Suicide Helpline (1 eps)
Richard Ian Cox
Mark McPhee (1 eps)
Barry Pepper
Tyson Ruddick (1 eps)
Jason Gray-Stanford
Airman (1 eps)
John Pyper-Ferguson
Brian Chason (1 eps)
Barry W. Levy
David Cohen (1 eps)
Sarah Strange
Rachel Connors (1 eps)
Robin Mossley
Doctor (1 eps)
Corrie Clark
Young Sylvia (1 eps)
Scott McNeil
Astronaut (1 eps)
Garwin Sanford
Senator Meade (1 eps)
Roger Barnes
Tyler (1 eps)
Frank Ferrucci
Receptionist (1 eps)
Ken Kirzinger
Moloch (1 eps)
Natsuko Ohama
Dr. Stephanie Codada (1 eps)
Peter Donat
Principal Kern (1 eps)
Michael Kopsa
Engineer (1 eps)
Malcolm Stewart
Joel Haas (1 eps)
Ian Tracey
Mr. Tarkman (1 eps)
William B. Davis
John Wymer (1 eps)
Rod Wilson
D.J. (1 eps)
Dave 'Squatch' Ward
Giant Convict (1 eps)
Maxine Miller
Helen (1 eps)
Robert Ito
Colonel Raymond (1 eps)
Ryan Phillippe
Russell 'Rusty' Dobson (1 eps)
Brent Sheppard
F.B.I. Agent #1 (1 eps)
Mig Macario
Lab Tech (1 eps)
Claire Riley
News Anchor (1 eps)
Jonathan Scarfe
Charlie Walters (1 eps)
Kendall Cross
Allison Morris (1 eps)
Victoria Morsell
Candace (1 eps)
April Telek
Young Lucy (1 eps)
Arnie Walters
Committee Member (1 eps)
Steve Makaj
Officer Brown (1 eps)
Fawnia Mondey
New Human (1 eps)
Brian Arnold
Newscaster (1 eps)
Sebastian Spence
Young Gerry (1 eps)
J. Douglas Stewart
Watts (1 eps)
