Arthur Hill
Dr. Jeremy Stone
Acting
David Wayne
Dr. Charles Dutton
Acting
James Olson
Dr. Mark Hall
Acting
Kate Reid
Dr. Ruth Leavitt
Acting
Paula Kelly
Karen Anson
Acting
George Mitchell
Jackson
Acting
Ramon Bieri
Major Manchek
Acting
Peter Hobbs
General Sparks
Acting
Kermit Murdock
Dr. Robertson
Acting
Richard O'Brien
Grimes
Acting
Eric Christmas
Senator from Vermont
Acting
Mark Jenkins
Lt. Shawn (Piedmont team)
Acting
Peter Helm
Sgt. Crane (Piedmont team)
Acting
Joe Di Reda
Wildfire Computer Sgt. Burk
Acting
Carl Reindel
Lt. Comroe
Acting
Ken Swofford
Toby (technician)
Acting
Frances Reid
Clara Dutton
Acting
Richard Bull
Air Force Major
Acting
John Carter
MP Capt. Morton
Acting
Glenn Langan
Cabinet Secretary (uncredited)
Acting
Sandra de Bruin
Technician (uncredited)
Acting
Susan Brown
Allison Stone (uncredited)
Acting
Bart La Rue
Medic Captain (uncredited)
Acting
Walter Brooke
Assistant to Cabinet Secretary (uncredited)
Acting
Jan Burrell
Mother - Piedmont (uncredited)
Acting
Dee Carroll
Technician (uncredited)
Acting
Michael Crichton
Bearded Surgeon (uncredited)
Writing
David McLean
Sen. McKenzie (uncredited)
Acting
Emory Parnell
Pete 'Old Doughboy' Arnold (uncredited)
Acting
Michael Pataki
Operator of 'The Hand' (uncredited)
Acting
Quinn K. Redeker
Capt. Morris (uncredited)
Acting
Garry Walberg
Technician (uncredited)
Acting
Len Wayland
Utah Crash Site Officer (uncredited)
Acting
Jason Johnson
Dr. Benedict (uncredited)
Acting
Ivor Barry
Murray (uncredited)
Acting
Lance Fuller
Man (uncredited)
Acting
Don Messick
Alarm (voice) (uncredited)
Acting
Joan Swift
Decontamination Receptionist (uncredited)
Acting