From "Metropolis" to "Blade Runner," the juxtaposition of humans next to their artificial form has provided endless hours of stories that can be as exhilarating as they are poignant. [...] yet, without necessarily expanding on this well-trod territory or innovating contemporary science-fiction, by going deep on a simple construct, "Ex Machina" establishes itself as a unique and deeply unsettling psychological thriller that's both necessary and unforgettable. Caleb (Domhnall Gleeson), the sharp programmer whose life is upended to spend a few days in a remote location with his company's billionaire CEO and brilliant recluse, Nathan (Oscar Isaac); and Nathan's creation, Ava (Alicia Vikander). Garland builds a subtle tension by making everything slightly off, from the concrete, bunker-like bedrooms, to the occasional power-outages and the militaristic security methods. Isaac, who is quickly proving himself to be one of the greats of his generation, plays Nathan as a celebrity of sorts — the kind who is always requesting that the other person just be more "real," which usually has the opposite effect. Ex Machina," an A24 release, is rated R by the Motion Picture Association of America for "for graphic nudity, language, sexual references and some violence.