Mac and Nikki race to recover equipment from a downed experimental plane before the Soviets, who are using a psychic to guide them to the wreckage.

An impulsive scientist who cuts corners in her research work creates an uncontrollably mutating organism that speeds up the aging process.

MacGyver becomes infatuated with a woman while conducting environmental-impact studies. However, what MacGyver does not know is that the woman was hired to "persuade" him to skip the studies—and if necessary, kill him.