While out of town to help with a new hospital, MacGyver is witness to a UFO sighting, complete with strange crop circles in a farmer's field. He decides to investigate, and he uncovers a scam with the help of his new friends. A young boy named Tommy Wiley, and Phil Sternwise, a mysterious man who says he's only a salesman.

original airdate--December 3,1990

MacGyverisms

1. Ammonia, napalm, wires = chemical plasma
2. Spear salted wires to power lines = chemical plasma
3. Creates Electricle glow with wires and chemical power.