A young inductee into the military is given the task of looking after some chimpanzees used in the mysterious 'Project X'. Getting to know the chimps fairly well, he begins to suspect there is more to the secret project than he is being told.
Matthew Broderick
as Jimmy Garrett
Helen Hunt
as Teri Macdonald
Willie
as Virgil
William Sadler
as Dr. Carroll (as Bill Sadler)
Johnny Ray McGhee
as Robertson
Jonathan Stark
as Sgt. Krieger
Robin Gammell
as Col. Niles
Stephen Lang
as Watts
Jean Smart
as Dr. Criswell
Pamela Ludwig
as Lenore
Jules Sylvester
as Airman
Sonny Carl Davis
as Sgt. Ridley
