Willard
A social misfit, 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. (And their increasing number of friends) 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.
Alan Baxter, Almira Sessions, Arthur Tovey, Bern Hoffman, Bruce Davison, Elsa Lanchester, Ernest Borgnine, Helen Spring, J Pat O'Malley, Joan Shawlee, Jody Gilbert, John Myhers, Lola Kendrick, Louise De Carlo, Michael Dante, Minta Durfee, Paul Bradley, Pauline Drake, Shirley Lawrence, Sondra Locke, William Hansen