
QuickRating: Despite its low budget, relatively slow pacing and limited cast, "Retreat" is still a gripping, quite unpredictable, and incredibly effective virus-themed UK horror thriller, that succeeds mainly due to the brilliantly disturbing portrayal by the underrated Jamie Bell, the excellent performances by Cillian Murphy and Thandie Newton, the tense atmosphere, and the deserted island setting, that is a stunning as it's claustrophobic.