Everything About Fiction You Never Wanted to Know.
There are seven deadly sins, Captain. Gluttony, greed, sloth, wrath, pride, lust, and envy. Seven... You can expect five more of these.
William Somerset

Se7en (or Seven) is a 1995 American crime/horror/thriller film, directed by David Fincher of Fight Club fame and staring Morgan Freeman and Brad Pitt as homicide detectives Somerset and Mills. Somerset is about to retire and be replaced by Mills in the department, but the two get caught up in a string of murders, each inspired by the Seven Deadly Sins and all caused by one intelligent and elusive Serial Killer. A distinctive dark atmosphere and a skillful balance of Gory Discretion Shots ends up creating a far more disturbing product than the Gorn films that try and emulate it. Often ranked with The Silence of the Lambs and Psycho as the pinnacle of serial killer fiction.

Tropes used in Se7en include:

Mills: Fucking Dante! Goddamn poetry-writing faggot, piece of shit! Fucker!

  • Cowboy Cop: David Mills. Subverted as Mills is obviously trying to be one but instead comes across as naive and impulsive.
  • Crapsack World: Detective Somerset and the villain seem to share this perspective on the world. At the end, Somerset states that the world is still worth fighting for, even if it is a shithole.
  • Creative Closing Credits: The grungy credits scroll down instead of up.
  • Creepy Monotone: John Doe, most of the time.
  • Deadpan Snarker: David Mills, so very much.
  • Death by Disfigurement: Invoked with the Pride victim, who killed herself. John Doe picked a very beautiful and vain woman and disfigured her, presumably to the point that plastic surgery would have been unable to restore her face. He then glued a phone into one hand (so she could call 911), and a bottle of sleeping pills into the other (so she could commit suicide). According to the villain, the woman was so full of pride that she swallowed the pills rather than go through the rest of her life with scars.

Dr. O'Neill: He cut off her nose.
Somerset: To spite her face.

Mills: Tell me she's alriiiiight!
Somerset: ...if you murder a suspect, David-
Mills: Noooo!

Doe: And after him I took the lawyer, and both of you must have secretly thanking me for that one. This is a man who dedicated his life to making money by lying, with every breath that he could muster to keeping murderers and rapists on the streets—
Mills: "Murderers."
Doe: A woman—
Mills: "Murderers", John. Like yourse—
Doe: A WOMAN! So ugly on the inside...

Doe: Don't ask me to pity those people. I don't mourn them any more than I do the thousands that died at Sodom and Gomorrah.
Somerset: Is that to say, John, that what you were doing was God's good work?
Doe: The Lord works In Mysterious Ways.

John Doe: What I've done is going to be puzzled over... and studied... and followed... forever.

Somerset: Well, in any major city, minding your own business is a science. First thing they teach women in rape prevention is never cry for help. Always yell "fire." Nobody answers to "help." You holler "fire," they come running.