A social misfit, Willard is made fun of by his co-workers, and squeezed out of the company started by his deceased father by his boss. His only friends are a couple of rats he raised at home, Ben and Socrates. However, when one of them is killed at work, he goes on a rampage using his rats to attack those who have been tormenting him.
Bruce Davison
Ernest Borgnine
Sondra Locke
Elsa Lanchester
Michael Dante
Jody Gilbert
William Hansen
John Myhers
J. Pat O'Malley
Joan Shawlee
Almira Sessions
Pauline Drake
Ed Haskett
Alan Baxter