Characters played by Arthur Hill
Dr. Jeremy Stone
Characters played by David Wayne
Dr. Charles Dutton
Characters played by James Olson
Dr. Mark Hall
Characters played by Kate Reid
Dr. Ruth Leavitt
Characters played by Paula Kelly
Karen Anson
Characters played by George Mitchell
Jackson
Characters played by Ramon Bieri
Major Manchek
Characters played by Kermit Murdock
Dr. Robertson
Characters played by Richard O'Brien
Grimes
Characters played by Peter Hobbs
General Sparks
Characters played by Eric Christmas
Senator from Vermont
Characters played by Mark Jenkins
Lt. Shawn (Piedmont team)
Characters played by Peter Helm
Sgt. Crane (Piedmont team)
Characters played by Joe Di Reda
Wildfire Computer Sgt. Burk
Characters played by Carl Reindel
Lt. Comroe
Characters played by Ken Swofford
Toby (technician)
Characters played by Frances Reid
Clara Dutton
Characters played by Richard Bull
Air Force Major
Characters played by John Carter
MP Capt. Morton
Characters played by Paul Ballantyne
Hospital Director
Characters played by Benjie Bancroft
Police Officer
Characters played by Ivor Barry
Murray
Characters played by Joe Billings
Scientist
Characters played by Patty Bodeen
Girl
Characters played by Michael Bow
MP at Stone's
Characters played by Walter Brooke
Assistant to Cabinet Secretary
Characters played by Susan Brown
Allison Stone
Characters played by Jan Burrell
Mother - Piedmont
Characters played by Dee Carroll
Technician
Characters played by Duke Cigrang
Father - Piedmont
Characters played by Rhodie Cogan
Minor Role
Characters played by Michael Crichton
Bearded Surgeon
Characters played by Lisa Daniels
Woman
Characters played by Sandra de Bruin
Technician
Characters played by Bill Dunbar
Vandenberg AFB Sergeant
Characters played by Harold Dyrenforth
(uncredited)
Characters played by Walker Edmiston
Voice
Characters played by Sandra Ego
Girl
Characters played by Don Ellis
Minor Role
Characters played by Judy Farrell
Pam
Characters played by Lance Fuller
Man
Characters played by James W. Gavin
Dempsey - Helicopter Pilot
Characters played by Sheila Jo Guthrie
Girl - Piedmont
Characters played by Ray Harris
Scientist
Characters played by Robert L. Hughes
Air Force Technician
Characters played by Jason Johnson
Dr. Benedict
Characters played by Bart La Rue
Medic Captain
Characters played by Jamie Lamb
Boy - Piedmont
Characters played by Glenn Langan
Cabinet Secretary
Characters played by Johnny Lee
Boy
Characters played by Theodore Lehmann
Scientist
Characters played by Tom McDonough
Stetson
Characters played by David McLean
Sen. McKenzie (New Mexico)
Characters played by Cliff Medaugh
Civilian
Characters played by Don Messick
Alarm
Characters played by Victoria Paige Meyerink
(uncredited)
Characters played by Midori
Bess - Lab Technician
Characters played by Carl B. Morrison
Minor Role
Characters played by Robert 'Bob' Olen
Soldier
Characters played by Francisco Ortega
Gateman at Agricultural Center
Characters played by Emory Parnell
Pete 'Old Doughboy' Arnold
Characters played by Michael Pataki
Operator of 'The Hands'
Characters played by Alma Platt
Woman
Characters played by Quinn K. Redeker
Capt. Morris
Characters played by Clark Savage
M.P. Sergeant
Characters played by Georgia Schmidt
Old Lady - Piedmont
Characters played by Reuben Singer
Dr. Rudolph Karp
Characters played by Robert Soto
Manuel Rios - Baby
Characters played by Gilchrist Stuart
Man
Characters played by Joan Swift
Decontamination Receptionist
Characters played by Lorna Thayer
Woman
Characters played by Garry Walberg
Technician
Characters played by Len Wayland
Utah Crash Site Officer
Characters played by Gary Waynesmith
Air Force Technician
Characters played by Russ Whiteman
Civilian