Best Free Mystery Movies on Roku Channel

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.

The Roku Channel is another hidden gem of free streaming. Their mystery selection includes a mix of classics and underrated gems that cost absolutely nothing to watch.

These are the mysteries that kept real viewers guessing — and satisfied them with the answer.

Every movie on this list is completely free to stream and ranked by ThumbScore — the percentage of everyday people who liked the film. No subscriptions needed, no hidden costs.