They made a bunch of Thin Man Movies, based on the original Thin Man book (which believe it or not is a great sleuth story)
(There may be spoilers here but if you don’t know them yet, you deserve spoils.)
I’ll give you a hint (but don’t use the freakin; web to solve it or I’ll put the Russians on your blog or email.
Hint: the room they are standing before is an important clue.
Nora discloses that she’s with child.