Well, I’m not too pleased with the way Suspicion ends. I had something else in mind. The scene I wanted, but it was never shot, was for Cary Grant to bring her a glass of milk that’s been poisoned and Joan Fontaine has just finished a letter to her mother: “Dear Mother, I’m desperately in love with him, but I don’t want to live because he’s a killer. Though I’d rather die, I think society should be protected from him.” Then, Cary Grant comes in with the fatal glass and she says, “Will you mail this letter to Mother for me, dear?” She drinks the milk and dies. Fade out and fade in on one short shot: Cary Grant, whistling cheerfully, walks over to the mailbox and pops the letter in. - Alfred Hitchcock
I conceived that scene in terms of the participants’ desire not to interrupt the romantic moment. It was essential not to break up the mood, the dramatic atmosphere. Had they broken apart, all the emotion would have been dissipated. And, of course, they had to be in action; they had to go over to the phone that was ringing and keep on embracing throughout the whole call, and I also felt that the public, represented by the camera, was the third party to this embrace. The public was being given the great privilege of embracing Cary Grant and Ingrid Bergman together. It was a kind of temporary ménage à trois. – Alfred Hitchcock