Balsam had a significant breakthrough with his role as Juror #5 in Sidney Lumet's acclaimed drama 12 Angry Men. This performance established him as a reliable and powerful character actor in a high-profile film.
He achieved widespread recognition for his memorable and pivotal role as Detective Milton Arbogast in Alfred Hitchcock's iconic horror film Psycho. His chilling scene cemented his presence in cinematic history.
Balsam reached a career peak, winning the Academy Award for Best Supporting Actor for his portrayal of Arnold Burns in the comedy-drama A Thousand Clowns. This award solidified his status as a highly respected and talented performer.