Chinatown to Knives Out to Anatomy of a Fall. The films that built their entire structure around a question worth answering.
The mystery is one of cinema's oldest genres. It is also one of the hardest to do well. A mystery's structural challenge is that the audience needs to feel that the solution was discoverable from the clues — but only in retrospect, after the solution has been revealed. Too obvious and the film bores; too obscure and the film cheats. The films on this list all earn their solutions.
Our picks across eighty years of mystery cinema.
The technical requirement of the mystery genre is fair play. The audience needs the information to solve the puzzle, embedded carefully enough that they don't solve it before the protagonist does. The films above all manage this. Chinatown's incest reveal is, on rewatching, foreshadowed in almost every act. Memento's solution is in the opening shot, reverse-played. Anatomy of a Fall keeps multiple readings consistent with the available evidence.
The mystery genre also works best when the mystery is structurally connected to the protagonist's interior life. Gittes in Chinatown is trying to solve the case because he can't bear to be powerless. Leonard in Memento needs the case because the case is the only thing that gives his amnesia coherence. The case is, almost always, also the protagonist's own self-investigation.