- M - Eine Stadt sucht einen Mörder

Are we going to allow movies (like #3) that were made between WWI and WWII? That seems rather like shooting fish in a barrel.
Since no one else has objected, I guess the answer is yes.
- Murder on the Orient Express

And Captain: the title of Friendly Persuasion is a pun. The family are Quakers (that's why they "thee" each other), members of the Society of Friends, that is, of the friendly persuasion.
Jessamyn West, who wrote the novel, was some kind of cousin of Richard Nixon, whose Quaker mother still used "thee."