Arthur Hill, David Wayne
, James Olson
, Kate Reid
, Paula Kelly
, George Mitchell, Ramon Bieri, Peter Hobbs, Kermit Murdock, Eric Christmas
, Mark Jenkins, Peter Helm, Joe Di Reda, Carl Reindel, Richard O'Brien
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. Many years prior to this incident, a group of eminent scientists led by Dr. Jeremy Stone () advocated for the construction of a secure laboratory facility that would serve as a base in the event an alien biological life form was returned to Earth from a space mission. Stone and his team - Drs. Dutton, Leavitt and Hall (, , and (, respectively)- go to the facility, known as Wildfire, and try to first isolate the life form while determining why two people from Piedmont (an old wino 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 should it manage to escape.