The Midwest USA is invaded by stingray-shaped alien slugs that ride on people's backs and control their minds in order to spread their dominion. Government agency reps Sam Givens, Andrew Nivens, and Mary Sefton must stop the aliens.
Donald Sutherland
Andrew Nivens
Eric Thal
Sam Nivens
Julie Warner
Mary Sefton
Keith David
Alex Holland
Will Patton
Dr. Lawrence Graves
Richard Belzer
Neil Jarvis
Tom Mason
President Douglas
Yaphet Kotto
Ressler
