Six Degrees of Separation (1993)
Flan and Ouisa Kittredge, rich NYC art dealers, are called on one night by a young man, Paul, who professes to be a friend of their kids' from Harvard. They offer him a bed for the night; he enchants them with a home-cooked meal and magnificent conversation. The next morning, they learn that he is not all he seems to be. Their investigations are intriguing and lead them to re-evaluate their lives.