|Ingrid Bergman, "Notorious," 1946.|
The plot involving the Nazis is really just a MacGuffin. (It turns outRains and other Germans are perhaps trying to create an atomic bomb, mining Uranium and hiding the ore in wine bottles in Rains' basement.) What's important is Bergman's love for Grant, and his love for her in return. But how can he love her when she is with another man - even if it's "just a job?"
Like I said, complicated, especially for 1946. I credit much of this to Ben Hecht's superb script. He also wrote "Spellbound" for Hitchcock is listed as an uncredited writer on many of Hitch's films.
Grant eventually rescues Bergman from Rains, who discovers she is an agent and slowly poisons her. There is a great scene at the end of the film where Grant is carrying Bergman down a staircase and Rains, afraid his co-conspirators will find out she is a spy, "helps" Grant down the stairs and out the door. But at the car, Grant shuts Rains out, leaving him alone to his certain doom. It's the prefect ending to a film where the intentions of the characters are so complicated.