
When virtually all of the residents of Piedmont, New Mexico, are found dead after the return to Earth of a space satellite, the head of the US Air Force's Project Scoop declares an emergency. A group of eminent scientists led by Dr. Jeremy Stone scramble to a secure laboratory and try to first isolate the life form while determining why two people from Piedmont - an old alcoholic and a six-month-old baby - survived. The scientists methodically study the alien life form unaware that it has already mutated and presents a far greater danger in the lab, which is equipped with a nuclear self-destruct device designed to prevent the escape of dangerous biological agents.

Dr. Jeremy Stone

Dr. Charles Dutton

Dr. Mark Hall

Dr. Ruth Leavitt

Karen Anson

Jackson

Major Manchek

General Sparks
Dr. Robertson

Grimes

Senator from Vermont
Lt. Shawn (Piedmont team)

Sgt. Crane (Piedmont team)
Wildfire Computer Sgt. Burk

Lt. Comroe

Toby (technician)

Clara Dutton

Air Force Major

MP Capt. Morton

Cabinet Secretary (uncredited)
Technician (uncredited)

Allison Stone (uncredited)
Medic Captain (uncredited)

Assistant to Cabinet Secretary (uncredited)

Mother - Piedmont (uncredited)
Technician (uncredited)

Bearded Surgeon (uncredited)

Sen. McKenzie (uncredited)

Pete 'Old Doughboy' Arnold (uncredited)

Operator of 'The Hand' (uncredited)

Capt. Morris (uncredited)

Technician (uncredited)
Utah Crash Site Officer (uncredited)
Dr. Benedict (uncredited)

Murray (uncredited)

Man (uncredited)

Alarm (voice) (uncredited)
Decontamination Receptionist (uncredited)
Woman (uncredited)
Hospital Director (uncredited)
Police Officer (uncredited)
Scientist (uncredited)
Girl (uncredited)
MP at Stone's (uncredited)
Father - Piedmont (uncredited)
Minor Role (uncredited)

Woman (uncredited)
Vandenberg AFB Sergeant (uncredited)
Minor Role (uncredited)

Voice (voice) (uncredited)

Girl (uncredited)
Minor Role (uncredited)
Pam (uncredited)
Dempsey - Helicopter Pilot (uncredited)
Girl - Piedmont (uncredited)
Air Force Technician (uncredited)
Boy - Piedmont (uncredited)
Boy (uncredited)
Scientist (uncredited)
Stetson (uncredited)
Civilian (uncredited)

Minor Role (uncredited)

Bess - Lab Technician (uncredited)
Minor Role (uncredited)
Gateman at Agricultural Center (uncredited)
Old Lady - Piedmont (uncredited)
Dr. Rudolph Karp (uncredited)
Man (uncredited)

Woman (uncredited)
Air Force Technician (uncredited)
Civilian (uncredited)