The Best Mystery Movies on MGM+
Updated October 19, 2026
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The best mystery movies make you feel smart for figuring it out, or stunned that you didn't. Either way, audiences know when a mystery delivers. Critics tend to overthink the puzzle and miss the fun.
MGM+ streams much of the MGM and United Artists library. These are its mystery movies that audiences rated highest.
These are the mysteries that kept real viewers guessing — and satisfied them with the answer.
Every movie on this list is ranked by ThumbScore — the percentage of everyday people who liked the film. No critic gatekeeping, no algorithmic manipulation. Just real audience verdicts.
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