Arsenic and Old Lace

The cellar in the home of Abby and Martha Brewster, elderly spinster sisters, hides the graves of the elderly, lonely gentleman they have poisoned to relieve their suffering and give them peace.  As the truth is revealed, comedy ensues as their nephew Mortimer tries to figure out how to handle the situation while contending with one brother who believes he is Teddy Roosevelt and his other evil brother who looks like Boris Karloff.