I was very young when I saw the movie (many decades ago) - I've never forgotten the scene with the brother.... hmmm... maybe I was too young to have watched it. And I had a long lasting crush on GP who was one year older than my father.
Valli does a phenomenal impression of Ingrid Bergman, If I were just listening to this without any performer credits, I would just assume it to be IB. (Also interesting that on the radio, Murcheson only ATTEMPTS to kill himself. In the movie, I think we can pretty much assume he's toast.)