An experiment on a simpleton turns him into a genius. When he discovers what has been done to him he struggles with whether or not what was done to him was right.
Cliff Robertson
Charlie Gordon
Claire Bloom
Alice Kinian
Lilia Skala
Dr. Anna Straus
Leon Janney
Dr. Richard Nemur
Ruth White
Mrs. Apple
Dick Van Patten
Bert
Edward McNally
Gimpy
Barney Martin
Hank
