Trust No One
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.
Higgins
Alex Holland
Dr. Lawrence Graves
Andrew Nivens
Culbertson
Neil Jarvis
Hawthorne
Mary Sefton
General Morgan
Ressler
President Douglas
Viscott
Greenberg
Slugged Businessman (uncredited)
Sam Nivens
Barnes
Miss Haines
Gidding
Vince Hayward