The Red Danube?
No, but those are all really good guesses, and you know films! I think I picked a movie that is too obscure. The Golden Age A-list actress who stars in it is Lana Turner.
Isn’t the attitude toward weapons in that movie quaint?
Knives: expected.
One handgun: shocking!
I must admit that I didn’t look up the line (which would really be cheating), but I did do a search for movies with a Mother Superior between 1940 and 1958. The Red Danube matched your description on two other points: Ethel Barrymore and Dame Angela “Jessica Fletcher” Lansbury.
The only movie with severe weather effects I could think of was Strange Cargo with Clark Gable (1940), but the female lead in that one was Joan Crawford, and as far as I recall there was no Mother Superior…
Hmm. Very surprised it did not come up-- its weather effects were gold standard until CGI.
Dame May Whitty is the Mother Superior, and is billed as “Dame.”
“Out of order? FUCK! Even in the future, nothing works!”
This must be it then. Can’t say I’ve ever heard of it, though.
Edmund Gwenn, Reginald Owens, and Frank Morgan were, of course all in Christmas-themed movies.
And Donna Reed got her own TV series in the '60s.
That’s it!
I saw it when I was about 11 the first time, and could suspend disbelief for anything-- totally sucked into it. But I’ve seen it a few times since, and I always enjoy it.
Helluva cast
The way things go for me, it’ll probably be on late-night TV soon, now that I know about it. (I don’t get many movie channels any more; too expensive. 
)
Foreign Correspondent with Edmund Gwenn just came on Silver Screen.
That’s where I saw it first, probably at 1, 2 or 3am, when I was in middle school.
I fell in love with Hollywood’s Golden Age when I was about 9, and every Saturday, when the newspaper came with a TV schedule for the following week, I got a red pencil, and scanned down the movie list for anything-- anything from the 30s or 40s and circled it. If it was labeled Mystery, Suspense, Horror, Sci-Fi or Thriller, I put a star by it. If it starred an actor I liked, I put either one or two stars.
Lana Turner was on my 1-star list.
I also stopped and read about the films from the 1950s. Some of them I’d circle. I circled A Streetcar Named Desire, just because it had Vivien Leigh.
I’d read about the 60s films, but didn’t circle many-- I did manage to see The Chalk Garden, The Miracle Worker, and The Lion in Winter that way.
I remember Gaslight being a 3-star movie, a Mystery with Ingrid Bergman. Had never heard of it, though. But, wow.
Wasn’t as much fun as those once-in-a-lifetime late nights when I was a kid, but when VHS glutted the market with just about everything in public domain, I binge-watched.
LOL
I did like the movie when I was a teenager, but none of those gang guys looked anything like what I imagined NY city gang members would look like.
“Everyone has somebody that they want to put out of the way. Oh now surely, Madam, you’re not going to tell me that there hasn’t been a time that you didn’t want to dispose of someone. Your husband, for instance?”
I had seen most of the movies I know today by the time I was in high school. Throughout the '60s and into the '70s, broadcast TV was still showing ones dating back to the first talkies of the '20s. I remember staying up past three in the morning on weekends to watch stuff like Charlie Chan, The Three Stooges, and Laurel and Hardy. Classics like Casablanca, Captain from Castille, The Treasure of the Sierra Madre, and Quo Vadis? were always on in the afternoon and evening.
I can hear the voice of George Sanders saying this. It’s not from A Shot in the Dark, is it?
Nope.
Double Indemnity would be my second guess, but I don’t recall Walter addressing Phyllis as “Madam.”
It does sound very much like something Walter would say, but I’m afraid not.
Claude Rains as the Devil in Angel on My Shoulder?
Nope again. I’ll narrow it down a little bit: the speaker is not English.
Not English, or not a native English speaker?