If I’m not mistaken, this was the first film ever where Ingrid Bergman - one of my top actresses, period - was given top billing, and that is a magnificent thing!
Bergman in her Swedish years was much more subdued than Bergman in Hollywood but that’s not necessarily a bad fact. Actually, I’d argue quite the opposite, for her subdued romance in “Intermezzo” is as beautiful as the music she’s playing.
She has an almost innocent quality here which makes the story and the morals entirely gripping. It’s an acting class in a box, and that’s all due to Bergman (I’m talking about the Eclipse set, btw).
Although I’m only talking about the acting, I’m doing that on purpose. The rest of the film is mostly uneventful and unattributable in any form. Yet, with the performance Bergman gives, that almost entirely makes up for the lack of anything else noteworthy.