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“Paranoia” is a plug-and-play Hollywood thriller, not the best the genre has to offer but hardly the worst. The formula: Take a handsome up-and-coming male lead (Liam Hemsworth, Gale in “The Hunger Games” franchise), surround him with aging stars in juicy character roles (Harrison Ford, Gary Oldman), and send them all chasing after a high-tech MacGuffin that ultimately means nothing to the plot. Fold in a dewy romantic interest (Amber Heard, pretty and bland), a glasses-wearing best friend (Lucas Till), a hired assassin with some kind of visual gimmick (Julian McMahon with a bad dye job), and, bingo, you’ve got generic product fit for consumption on an airplane, in a hotel room, or anywhere there’s enforced down time. As processed cheese goes, the movie’s edible and forgettable.