* CompleteMonster: Charles [[EvilUncle "Uncle Charlie"]] Oakley is a [[FauxAffablyEvil seemingly affable and caring]] man who in actuality is a cold-blooded SerialKiller known as the "Merry Widow Murderer". Denouncing widows as "[[HeManWomanHater greedy, fat wheezing animals]]" who exploit their husbands' hard-earned wealth, Charles has strangled at least four women to death, [[TheBluebeard stealing their fortunes for himself]]. When his niece discovers evidence of his dark secret, Charles sets about attempting to murder her, sabotaging a staircase to make her fall to her death, locking her in a garage with a running car to asphyxiate her, and ultimately attempting to throw her off a speeding train. A misanthropic maniac who has no remorse for his petty actions, Uncle Charlie stands out as one of the earliest, and most vile, depictions of a sociopath in film.
* IdiotPlot: Creator/RogerEbert considers it to have elements of this, [[http://www.rogerebert.com/apps/pbcs.dll/article?AID=/20111109/REVIEWS08/111109966/1004 even though to him it's still a masterpiece.]]
* NightmareFuel: Uncle Charlie's ''incredibly'' creepy rant during dinner, about how rich widows are useless, wheezing cattle who deserve to be slaughtered. What's almost as creepy is how everyone else brushes it off within seconds. It's the WeirdnessCensor being PlayedForDrama, and it works.