Collider ranks ten psychological and crime thrillers that it says remain disturbing long after viewing, emphasising films driven by unease, ambiguity and moral darkness rather than straightforward violence.

– ‘The Vanishing’ (1988): a man’s obsessive search for his missing girlfriend becomes a devastating study of certainty and evil.
– ‘Memories of Murder’ (2003): Bong Joon-ho’s serial-killer investigation exposes policing failures and the absence of satisfying resolution.
– ‘Frailty’ (2001): a man recounts how his devout father believed God had ordered him to kill supposed demons.