Sigma | Chicago Reader

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Director Jesse Heffring used real surveillance cameras to shoot this Canadian cyberthriller about a doctor (Colin Walsh) ensnared in a high-tech scavenger hunt by an omniscient villain at the other end of his cell phone. The doctor's wife is imprisoned in a tank that floods every time he's given a new task, and only his timely completion of it will save her from drowning. Heffring's theme—how heightened security limits our personal choices—is rich in possibilities, and the spare dialogue and eerie visuals sustain the tension for a while. But ultimately the gimmicks become tiresome, and the ending is marred by weak acting and sloppy writing. In English and subtitled French. 84 min.

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