Top 8 Best Whodunit Movies on Amazon Prime (Ranked & Where to Stream)

Billy Wilder transforms Agatha Christie’s stage play into an electrifying legal duel anchored by Charles Laughton’s thunderous turn as a sickly, cantankerous defense barrister. Defending an amiable charmer accused of murdering an affluent widow, the defense relies on an alibi provided by the defendant's ice-cold German wife, played with razor-sharp inscrutability by Marlene Dietrich. The narrative functions like clockwork, tossing red herrings across pristine wood-paneled courtrooms while maintaining ruthless comedic timing. For mystery buffs scouring Prime for airtight classical plotting, this remains the definitive blueprint. Its climax delivers one of the sharpest triple-reversals ever staged, ensuring that anyone hungry for authentic puzzle-box mechanics gets complete narrative payoff without cheap misdirection.

Postwar Los Angeles rots from the inside out in Curtis Hanson’s peerless adaptation of James Ellroy’s brutal crime novel. When a mass shooting at the Nite Owl diner leaves six bodies on the floor, three radically different detectives—a ruthless bruiser, a slick media hound, and an ambitious bureaucrat—pull on disparate threads of evidence that tie back to citywide racketeering. The film excels through immaculate pacing and layered character friction, refusing to dumb down its tangled web of deceit. It stands out on Prime as an absolute gold standard for subscribers who prefer their investigative mysteries soaked in moral rot, period grit, and rapid-fire dialogue that never wastes a single frame.

Memory is malleable, but physical evidence inked into human flesh cannot be erased. Christopher Nolan turns the detective format inside out by forcing viewers to track a wife-murder investigation backwards through the fractured perspective of Leonard Shelby, an investigator unable to form new short-term memories. Guy Pearce brings devastating emotional vulnerability to a protagonist who must constantly decipher his own polaroids and cryptic tattoos. Placing this narrative puzzle on Prime gives genre fans an ingenious subversion of the sleuth paradigm. Instead of asking merely who committed the heinous crime, the story interrogates whether the detective himself can trust his own deduced reality, delivering a visceral gut punch at the finish line.

Blood tests, flamethrowers, and howling sub-zero Antarctic winds turn an isolated research outpost into the ultimate high-stakes interrogation room. John Carpenter reimagines investigative horror by introducing an alien organism capable of perfectly imitating any living host it absorbs, transforming a tight-knit crew into suspicious, twitchy combatants. Kurt Russell anchors the ensemble with exhausted grit as everyone attempts to deduce who among them has been replaced. While traditionalists might classify this under creature features, its core engine is an airtight whodunit where identifying the impostor is a matter of life or death. It offers Prime viewers a masterclass in relentless dread and razor-edged tension unmatched by polite parlor mysteries.

Decades after a teenage heiress vanishes from an isolated island gathering, a disgraced financial journalist and a fiercely brilliant antisocial hacker join forces to unearth the truth buried within a wealthy family's corrupt dynasty. Niels Arden Oplev’s Swedish adaptation captures the bleak, methodical precision of Stieg Larsson’s novel, leaning heavily into archived photographs, ledger entries, and grim generational secrets. Noomi Rapace commands the screen with fierce, wounded intensity opposite Michael Nyqvist’s grounded decency. Subscribers seeking a methodical, winter-chilled procedural will find this indispensable on Prime. It approaches cold-case crime solving with unflinching narrative maturity, rewarding patient viewers who appreciate intricate investigative groundwork over flashy theatrics.

Paris oozes glamour and mortal peril when a newly widowed American socialite discovers her late husband was murdered after liquidating their entire fortune into a missing quarter-million dollars. Stanley Donen balances Parisian high fashion with sudden violence as Audrey Hepburn navigates a gauntlet of menacing World War II veterans and Cary Grant’s endlessly shifting pseudonyms. Maurice Jarre’s brisk score and Peter Stone’s crackling, flirtatious screenplay turn fatal deceptions into pure sparkling entertainment. This breezy thriller earns its Prime rotation by proving that lethal whodunits do not need to be dreary to be cunning. The mystery keeps you guessing who is genuine until the final theater confrontation.

Shadows, dripping tallow candles, and muddy monastic squalor set the stage for a fourteenth-century string of bizarre deaths within a remote Benedictine abbey. Sean Connery shines as William of Baskerville, a razor-witted Franciscan friar employing Aristotelian logic and forensic deduction to investigate corpses turning up inside vats of pig blood and locked scriptoriums. Christian Slater provides the eager novice sounding board as religious superstition threatens to burn the truth alive. For streaming sleuth enthusiasts on Prime, this historical adaptation stands out as a unique cerebral feast. It treats medieval detective work with gritty authenticity, pitilessly exposing dogmatic fanaticism while unspooling a layered intellectual riddle.

Did Lieutenant Manion act under an irresistible impulse when shooting his wife's alleged rapist, or was it cold, calculated revenge? Otto Preminger’s landmark legal procedural strips away courtroom melodramatics in favor of raw forensic reality and tactical legal gamesmanship. James Stewart delivers one of his finest performances as a laid-back, jazz-loving country lawyer clashing with George C. Scott’s ruthless big-city prosecutor over circumstantial evidence and unreliable human testimony. It makes an essential watch on Prime for anyone fascinated by the murkier corners of whodunit storytelling, where the central mystery concerns human motives, legal manipulation, and whether absolute truth can ever survive the witness stand.