Crimes and Misdemeanors (1989)

Woody Allen's treatise on how the wicked go unpunished while the good live difficult lives - also a question as to the existence of God. The film is a masterpiece mainly due to its ability to pose (and attempt to answer) very difficult existential questions while at the same time making you laugh until your abdomen hurts.

A powerful and wealthy doctor tries to cover up his affair through murder while at the same time a geeky documentary film maker tries to flirt with other women hoping for an affair. The two of them suffer different consequences.

IMDB