If you loved Knife in the Water, try Death and the Maiden
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Roman Polanski, and they both carry the dread mood tag, and they sit in Drama / Thriller territory. If that's the register that drew you to Knife in the Water, the second film will land in a comparable space — through a different lens.
dread
What Death and the Maiden is
Seaside villa. Rain on glass. A stranger seeks shelter. Years after unspeakable violence, a woman believes she recognizes her attacker. Her husband, a human rights lawyer, tries to mediate, but her certainty proves absolute. Polanski at his most claustrophobic.

