
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.

as Dr. Jeremy Stone

as Dr. Charles Dutton

as Dr. Mark Hall

as Dr. Ruth Leavitt

as Karen Anson

as Jackson

as Major Manchek

as General Sparks

as Dr. Robertson

as Grimes

as Senator from Vermont

as Lt. Shawn (Piedmont team)

as Sgt. Crane (Piedmont team)

as Wildfire Computer Sgt. Burk

as Lt. Comroe

as Toby (technician)

as Clara Dutton

as Air Force Major

as MP Capt. Morton

as Cabinet Secretary (uncredited)

as Technician (uncredited)

as Allison Stone (uncredited)

as Medic Captain (uncredited)

as Assistant to Cabinet Secretary (uncredited)

as Mother - Piedmont (uncredited)

as Technician (uncredited)

as Bearded Surgeon (uncredited)

as Sen. McKenzie (uncredited)

as Pete 'Old Doughboy' Arnold (uncredited)

as Operator of 'The Hand' (uncredited)

as Capt. Morris (uncredited)

as Technician (uncredited)

as Utah Crash Site Officer (uncredited)

as Dr. Benedict (uncredited)

as Murray (uncredited)

as Man (uncredited)

as Alarm (voice) (uncredited)

as Decontamination Receptionist (uncredited)

as Woman (uncredited)

as Hospital Director (uncredited)

as Police Officer (uncredited)

as Scientist (uncredited)

as Girl (uncredited)

as MP at Stone's (uncredited)

as Father - Piedmont (uncredited)

as (uncredited)

as Woman (uncredited)

as Vandenberg AFB Sergeant (uncredited)

as (uncredited)

as Voice (voice) (uncredited)

as Girl (uncredited)

as (uncredited)

as Pam (uncredited)

as Dempsey - Helicopter Pilot (uncredited)

as Girl - Piedmont (uncredited)

as Air Force Technician (uncredited)

as Boy - Piedmont (uncredited)

as Boy (uncredited)

as Scientist (uncredited)

as Stetson (uncredited)

as Civilian (uncredited)

as (uncredited)

as Bess - Lab Technician (uncredited)

as (uncredited)

as Gateman at Agricultural Center (uncredited)

as Old Lady - Piedmont (uncredited)

as Dr. Rudolph Karp (uncredited)

as Man (uncredited)

as Woman (uncredited)

as Air Force Technician (uncredited)

as Civilian (uncredited)